Last Night's Look: Love It or Leave It?

KATY PERRY

She left her Barack Obama-themed fashion at home, but the pop star still made a statement at the Correspondents Dinner in a green Giambattista Valli Haute Couture gown with a gilded belt.

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Last Night's Look: Love It or Leave It?

AMY POEHLER

Queen of the "Nerd Prom?" The Parks and Recreation star and PEOPLE guest is glamorous at the White House Correspondents Dinner in an embellished white Basler gown with structural hip embellishments.

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Last Night's Look: Love It or Leave It?

SOFIA VERGARA

The newly blonde bombshell shows off her killer shape in a crisscross bodice Herve L Leroux teal gown accented with killer magenta Lorraine Schwartz jewels at the White House Correspondents Dinner.

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Last Night's Look: Love It or Leave It?

KERRY WASHINGTON

This lady knows her way around the district! Okay, the Scandal star's D.C. life may be fictional, but Washington still commands attention from the Oval Office's inner circle in her dramatic gown, with its patterned, asymmetrical-train skirt (plus accompanying Christian Louboutin heels) at the White House Correspondents Dinner.

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Last Night's Look: Love It or Leave It?

ELIZABETH BANKS

Now, we know what the Hunger Games star looks like in The Capitol. But here's what she looks like in our nation's capital. The actress is elegant in a deep copper Roland Mouret gown, polished black Edie Parker clutch and rose gold Irene Neuwirth earrings.

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Last Night's Look: Love It or Leave It?

DUCHESS CATHERINE

Well, this is a print we're not used to seeing on the Duchess! She shakes things up at the inauguration of Warner Bros. Studio in Watford, England, wearing a polka-dot Topshop mini, plus a black blazer, clutch and pumps.

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Last Night's Look: Love It or Leave It?

JULIANNE HOUGH

To celebrate Conde Nast Traveler's Hot List in South Beach, Julianne brings the heat in an orange A.L.C. maxi with a high slit that has us totally ready for summer (and on the hunt for a great self-tanner).

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Last Night's Look: Love It or Leave It?

KATE BECKINSALE

Speaking of prints… At the Funny Girl screening in L.A., the actress steals the show in a tuxedo blazer with funky patterned sleeves, paired with coordinating silk pants (both by Parker), Amrapali earrings and chic black accessories, including a Me Char clutch.

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Last Night's Look: Love It or Leave It?

EMMY ROSSUM

Another pretty, feminine look from the actress, this one a gauzy white Tory Burch gown embellished with bold red flowers and paired with satiny red sandals to celebrate the release of her album "Sentimental Journey" in L.A.

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Last Night's Look: Love It or Leave It?

VANESSA HUDGENS

For a "Material Girl" event at Macy's in Century City, Calif., Vanessa wears what appears to be the material of the moment: denim. She cuffs dark skinnies, adds a blousy Material Girl tank with chambray touches and finishes off the look with – of course – white pumps.

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Last Night's Look: Love It or Leave It?

SALMA HAYEK

Yesterday, we were all buzzing over how one star didn't wear undergarments, but now we're just focused on Salma's on-display bra, visible through the keyhole cutout in her jade-green Saint Laurent maxi, selected for Les P'tits Cracks charity dinner in Paris.

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Last Night's Look: Love It or Leave It?

ASHLEY MADEKWE

We'd match our pedi to our dress too if the dress in question were as gorgeous as this peplum Monique Lhuillier number. The Revenge actress selects the patterned aqua dress (along with a yellow clutch and black stilettos, both Jimmy Choo, and Baccarat jewels) for the College Television Awards Gala in L.A.

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Last Night's Look: Love It or Leave It?

EMMA ROBERTS

She's wearing a duo-chromatic neoprene top (Giorgio Armani), but no, she's not SCUBA diving; she's attending an event for the designer in L.A. The actress pairs the unique tank with black pants then adds some shimmer via metallic accessories, including Sethi Couture hoops and a Jimmy Choo clutch.

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Last Night's Look: Love It or Leave It?

ROSIE HUNTINGTON-WHITELEY

If you're going to attend a Vogue dinner in honor of Michael Kors in London, you'd better show up looking fabulous in top-to-bottom Michael Kors. The model does just that with a leaf-print strapless dress and yep, more white pumps (hers are Jean-Michel Cazabat).

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Last Night's Look: Love It or Leave It?

KATE MARA

Kate, why are you on a red carpet for a House of Cards event in Hollywood when you know all we want you to do is film more episodes of the show?! The actress defies our wishes in a Mulberry shorts suit in a lacy floral print with a contrasting floral collar and Brian Atwood pumps.

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Last Night's Look: Love It or Leave It?

GWYNETH PALTROW

The World's Most Beautiful Woman is also the World's Leggiest in a sheer-paneled Antonio Berardi gown, which puts her toned body on full display at the Iron Man 3 premiere in Hollywood.

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Last Night's Look: Love It or Leave It?

DUCHESS CATHERINE

Should we take this baby-blue hue as a sign, Kate? She selects a sleeveless Emilia Wickstead dress for The Art Room reception in London, and tops it off with gray suede Rupert Sanderson pumps and her signature cascading curls.

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Last Night's Look: Love It or Leave It?

SELENA GOMEZ

Get it, girl! The funky pants fan opts for a floral, pajama-like pair, worn with a graphic tee (both 3.1 Phillip Lim) for a visit to the Elvis Duran Z100 Morning Show in N.Y.C. Bionda Castana sandals and a House of Lavande Vintage necklace complete Selena's laid-back, fresh look.

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Last Night's Look: Love It or Leave It?

DEMI MOORE

Yes, you're looking at a 50-year-old woman. She proves she hasn't lost her youthful sense of style in a plunging black jumpsuit with sheer sleeves and lace at the décolletage, chosen for the AFI's Night at the Movies in Hollywood.

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Last Night's Look: Love It or Leave It?

VANESSA HUDGENS

Coachella may be over, but Vanessa's funky style is forever. She puts her pins on display in a red-and-black romper, black blazer and pointy ankle-strap pumps at the SKYY launch party in West Hollywood, Calif.

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Last Night's Look: Love It or Leave It?

JANUARY JONES

The one thing we love just as much as watching Mad Men? Watching January on the red carpet. The actress pairs a Juicy Couture LWD with a metallic jacket, and completes the look with black-and-white pumps at an event for the show in N.Y.C.

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Last Night's Look: Love It or Leave It?

HEIDI KLUM

The supermodel sports yet another skintight dress. She dresses up this one, a red mini, with strappy sandals for the America's Got Talent premiere party in Hollywood.

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Last Night's Look: Love It or Leave It?

KIERNAN SHIPKA

Oh, NBD, just another couture homerun for the 13-year-old Mad Men star. Kiernan wows in a checkered denim dress, black booties and a hot-pink bag, all Chanel, for the brand's Artists Dinner Party at the Tribeca Film Festival.

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Last Night's Look: Love It or Leave It?

BELLA THORNE

How many trends can one girl wear at once? Let's see: bold print, peplum, high neckline, crop top, top knot. The actress pulls it all off in a two-piece Katie Ermillo creation, A Peace Treaty ring and Ruthie Davis pumps at the premiere of Iron Man 3 in Hollywood.

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Last Night's Look: Love It or Leave It?

JESSICA PARÉ

There's something fishy going on here. We're talking, of course, about the scales on the actress's Fendi silk dress, which she wears with maroon pumps for the N.Y.C. Mad Men event.

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Last Night's Look: Love It or Leave It?

JESSICA BIEL

Jess dons head-to-toe Tom Ford in the form of an asymmetrical LBD and gold-accented heels, to support JT (an honoree at the TIME 100 Gala in N.Y.C).

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Last Night's Look: Love It or Leave It?

CLAIRE DANES

What a fierce fashion choice! The new mom, who usually opts for minimalist looks, wears an animal-print, flounced-hem dress, a chic statement necklace and pumps (all by Lanvin) at the TIME bash.

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Last Night's Look: Love It or Leave It?

CHRISTINA AGUILERA

Christina's healthier lifestyle is continuing to pay off. The singer looks svelte in a Victoria Beckham cut-out black gown which she amps up with her signature fire-engine red lips and nails, and Lorraine Schwartz jewels, also at the TIME 100 Gala.

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Last Night's Look: Love It or Leave It?

JANUARY JONES

The actress leaves her daring designer duds at home and steps out in something we could actually wear: a flowy Zara top, Helmut Lang leather pants, an Elizabeth and James denim jacket and Christian Louboutin booties at the Paley Center Mad Men presentation in N.Y.C.

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Last Night's Look: Love It or Leave It?

UMA THURMAN

Uma keeps it simple, yet super chic in a royal blue Louis Vuitton shift, black strappy sandals and gold danglers at the Louis Vuitton Mansion grand opening in Munich, Germany.

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Last Night's Look: Love It or Leave It?

LENA DUNHAM

We applaud Lena for taking the plunge, but we're not sure this look is working for her. The Girls star braves a Saint Laurent gold dress with a super-low neckline and spiked waistband, plus sky-high T-bar heels (also Saint Laurent) at the TIME 100 Gala in N.Y.C.

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Last Night's Look: Love It or Leave It?

AMY POEHLER

On the opposite end of the style spectrum at the Time event, the Parks and Recreation star plays it safe in a black-and-nude long-sleeve Tadashi Shoji lace dress and peep-toe Stuart Weitzman heels.

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Last Night's Look: Love It or Leave It?

KIERNAN SHIPKA

With her high-end fashion prowess, we wouldn't be surprised if Kiernan graces the cover of Vogue soon. The 13-year-old star nails it once again in a floral frock, Dana Rebecca Designs earrings and pointy black pumps at the Paley Center Mad Men presentation in N.Y.C

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Last Night's Look: Love It or Leave It?

OLIVIA MUNN

Thank you, Olivia, for bringing a serious burst of color to the TIME 100 Gala. The actress stuns in a canary yellow lace gown by one of the night's honorees, Michael Kors, plus a gold Ofira cuff.

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Last Night's Look: Love It or Leave It?

JULIE BOWEN

Hey Julie, can we borrow your floral Monique Lhuillier frock for an upcoming wedding? The actress pairs the summery number with nude strappy sandals and a print Vince Camuto clutch at an Oscar de la Renta and Elizabeth Street party in West Hollywood, Calif.

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Last Night's Look: Love It or Leave It?

KATE HUDSON

Who knew a knee-length sweater dress could be so freakin' sexy? Kate nails it in the cream Jenny Packham creation, Jimmy Choo clutch and Casadei pumps at the Reluctant Fundamentalist premiere during the Tribeca Film Festival in N.Y.C.

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Last Night's Look: Love It or Leave It?

DUCHESS CATHERINE

The Duchess of Cambridge certainly knows how to dress her burgeoning bump to the nines. The royal mom-to-be attends an event at Willow Primary School in Wythenshawe, U.K., wearing a floral Erdem dress and navy pumps.

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Last Night's Look: Love It or Leave It?

KATY PERRY

In honor of her animated alter ego, Katy wears a blue Monique Lhuillier lace dress and matching floral headband to the photocall for The Smurfs 2 in Cancun. (She adds something Smurfette has never worn, though: silver Jimmy Choos.)

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Last Night's Look: Love It or Leave It?

JANUARY JONES

We've never wanted to borrow an outfit from Betty Draper, but we'd definitely like to get our hands on the printed Parker mini and Versace moto jacket the actress selects for the BAFTA New York Mad Men event in N.Y.C.

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Last Night's Look: Love It or Leave It?

HEIDI KLUM

The supermodel keeps things simple in an expected strapless LBD with studs by Hervé Léger and black strappy sandals at the NBC Universal summer press day in Pasadena, Calif.

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Last Night's Look: Love It or Leave It?

KELLY OSBOURNE

George Washington called; he wants his collar back. The TV personality goes retro, wearing her interesting neck accoutrement with a black mod dress, clunky white Aldo platforms and a bouffant at the E! upfront in N.Y.C.

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Last Night's Look: Love It or Leave It?

CHRISTINA HENDRICKS

The bombshell covers up more than usual in a black, long-sleeve dress and matching Stuart Weitzman pumps at the BAFTA Mad Men event in N.Y.C. The only pop of color (besides her mane, of course): those bold red lips.

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Last Night's Look: Love It or Leave It?

KOURTNEY KARDASHIAN

The oldest Kardashian sister takes a bit of a style risk in a navy crocodile-embossed Mlle dress with tan pumps and a Cuyana stainless steel statement necklace, but pulls off the look at the E! upfront in N.Y.C.

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Last Night's Look: Love It or Leave It?

KIERNAN SHIPKA

The tween star nearly steals the spotlight from her Mad Men female costars at the Mad Men event in N.Y.C. (no easy feat) in a black Dolce & Gabbana dress with sweet bows at the shoulders, plus mesh heels and perfectly polished curls.

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Last Night's Look: Love It or Leave It?

JESSICA PARÉ

Don Draper's on-screen wife looks regal in an emerald-green knee-length L'Wren Scott dress embellished with gold sequins at the collar, accessorized with cuffs and Casadei heels at the N.Y.C. Mad Men celebration.

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Last Night's Look: Love It or Leave It?

REBEL WILSON

She left her tracksuit at home! The comedienne goes glam in a red sequin Theia dress, silver Aldo sandals and a sparkly clutch at the premiere of her new movie Pain & Gain in Hollywood.

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Last Night's Look: Love It or Leave It?

JENNIFER LAWRENCE

The star's new long bob takes some (but not all) of the attention away from her majorly flared David Koma mini, which she wears with David Webb jewels for the GLAAD awards in L.A.

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Last Night's Look: Love It or Leave It?

REESE WITHERSPOON

Reese isn't one to let a run-in with the law stop her from looking amazing. The actress dons a gorgeous Saint Laurent LBD with Loree Rodkin earrings for The Cinema Society Screening of Mud in N.Y.C.

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Last Night's Look: Love It or Leave It?

DUCHESS CATHERINE

Bump watchers, take note! The royal mom-to-be dresses her now visible six-month pregnant belly in a mint green Mulberry coat, accessorized with nude LK Bennett heels for the National Review of Queen's Scouts celebration at Windsor Castle in Berkshire, U.K.

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Last Night's Look: Love It or Leave It?

CHARLIZE THERON

There's no denying Charlize wows in her black Jason Wu halter jumpsuit and Van Cleef & Arpels bangles at the GLAAD Awards in L.A. Still up for debate, though: that gold belt.

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Last Night's Look: Love It or Leave It?

DREW BARRYMORE

She's got her body back post-baby so we really wish the new mom would show off her shape! But Drew opts for matching, loose-fitting Dries van Noten safari-inspired separates at the GLAAD Awards in L.A.

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Last Night's Look: Love It or Leave It?

NAOMI WATTS

The Aussie actress takes the plunge in this Alexander McQueen dress for the premiere of her film Sunlight Jr. at the Tribeca Film Festival in N.Y.C. She pairs the bold-patterned frock with bold Monique Péan danglers, a blood-orange clutch and chunky black platforms.

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Last Night's Look: Love It or Leave It?

KIRSTEN DUNST

We're mad about Kirsten's mod Emilio Pucci lace mini, sported at the GLAAD Awards in L.A., and we have to admit we feel the same way about her cute ribbon headband.

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Last Night's Look: Love It or Leave It?

ELLE FANNING

It's official: Dakota's little sister has her own unique brand of standout style. The actress steals the spotlight in a whimsical Lanvin gown with plenty of volume at the hips. She accessorizes the frothy creations with a Jennifer Behr headband and Neil Lane jewels for the GLAAD Awards in N.Y.C.

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Last Night's Look: Love It or Leave It?

RUMER WILLIS

Let's all take a moment to obsess over Rumer's cascading ombré locks. Now let's move on to her chic black halter gown (with a fun satin collar) and croc clutch, spotted at the GLAAD awards in N.Y.C.

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Last Night's Look: Love It or Leave It?

KELLY ROWLAND

Rowland confidently rocks a whole slew of white-hot red carpet trends (high halter neckline, sheer panels, jumpsuit, a high waist) via her over-the-top Izmaylova creation at the annual GLAAD Awards in L.A.

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