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

JENNIFER LOPEZ

Do you think J.Lo has a special closet just for all her skintight gowns? The singer flaunts her figure in an electric-blue Tom Ford confection complete with a high neckline, allover sequins and a peekaboo design at the amfAR Inspiration Gala in N.Y.C.

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

SANDRA BULLOCK

The actress's black Victoria Beckham dress might look simple from the front, but it has some crazy strap detailing going on in the back. She teams the look with equally eye-catching black gladiator sandals and a pink mani-pedi for the premiere of The Heat in London.

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

KIRSTEN DUNST

It may look like an LBD, but Kirsten's actually wearing an LBSS (little black shorts suit) by Proenza Schouler at a private party for the designers in N.Y.C.

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

UMA THURMAN

The actress makes a major entrance by selecting a bold Atelier Versace gown featuring a whole lot of fabric, which she accessorizes with diamond danglers and some serious wrist bling at the amfAR Inspiration Gala in N.Y.C.

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

KATE BOSWORTH

Kate skips the bright summer mini for this spotted Proenza Schouler midi with an asymmetrical hemline. She completes her look with a black clutch and matching Aldo pumps at the party for the designers in N.Y.C.

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

JORDIN SPARKS

Yes, white pumps are still a thing. Jordin wears hers along with a curve-hugging turquoise dress with sexy slashes at the décolletage for the Songwriters Hall of Fame Induction and Awards Gala in N.Y.C.

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

IRELAND BALDWIN

Did anyone else do a double take and think this was Kim Basigner on the red carpet? The actress's daughter (she's only 17!) is pure sophistication in this black off-the-shoulder DSquared gown, worn with two oversize cuffs at the amfAR Inspiration Gala in N.Y.C.

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

RASHIDA JONES

Another star in spots, Rashida opts for a pretty black-and-white printed Proenza Schouler mini. But not even her dress can take our eyes off that multicolored statement necklace she's wearing at the designers' party in N.Y.C.

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

CARLY RAE JEPSEN

I wanna be where the people are… Oh sorry, we were just thinking of Ariel since the singer's dress reminds us a bit of The Little Mermaid. She wears the Carlie Wong gown composed of a yellow mini and a sheer patterned overlay with a gold clutch and turquoise cuff at the amfAR gala in N.Y.C.

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

TAYLOR SWIFT

Country darling turned total smokeshow. Taylor chooses a flowy white Emilio Pucci halter gown with a sheer insert on the bodice and rocks a chic top knot at the FiFi Awards in N.Y.C.

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

DUCHESS CATHERINE

This might be her most fashion-forward maternity look yet. Duchess Catherine steps out in a bold, printed Hobbs coat dress and a chic black fascinator at the Princess Cruises ship naming in Southampton, England.

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

MILEY CYRUS

Miley maintains her head-turning style in a pair of drop-waist baggy jeans (yes, one half is sweatpants), a leather bra top and matching jacket, plus white pumps and an "M" necklace by Jennifer Fisher (plus a tangle of other pieces) at a Myspace bash in L.A.

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

AMY ADAMS

Just another standout dress for the actress. Amy wears a strapless, tea-length Valentino Couture embroidered frock with Casadei ankle-strap pumps and a black headband at the Man of Steel premiere in London.

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

JANUARY JONES

The Mad Men star takes her new bangs out on the town in this printed Mary Katrantzou dress, which she complements with green eyeliner and matching Parade Design danglers at the Crystal and Lucy Awards in Beverly Hills.

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

VANESSA HUDGENS

Ripping a page out of Miley's style book, the actress also opts for a denim look – ripped boyfriend jeans, a tan-and-black jacket, Valentino heels and a mix of necklaces at the Myspace event in L.A.

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

ANNA KENDRICK

After stepping out in a major gown at the Tony Awards, Anna goes for a more laid-back look – a blush tulle skirt, white tank, metallic-embellished clutch and platform sandals at the See by Chloé fragrance event in N.Y.C.

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

OLIVIA WILDE

Printed pants. Blue graphic tee (both Kelly Wearstler). Embossed leather jacket. Bright red sandals. Yup, Olivia piles on a serious amount of edgy pieces at the Myspace party in L.A. Now, it's up you to decide if they all work together.

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

ELISABETH MOSS

The actress chooses another sexy mini, stepping out in a pale blue Emilio Pucci frock with a fitted bustier and tulip skit at the Crystal and Lucy Awards in Beverly Hills.

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

DIANNA AGRON

Yes, those are butterflies on Dianna's skirt! The actress (who's gone back to blonde again) pairs the printed Marc Jacobs design with a sleeveless button down blouse, blue clutch (also by Marc Jacobs) and white pumps at the Myspace event in L.A.

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

KATIE HOLMES

It's a fine line between boho-chic and ready for a toga party, which is why we need you to make the call on Katie's one-shoulder Chloé dress, which she wears with Azzedine AlaÏa gladiators at Coach's Summer Party on the High Line in N.Y.C.

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

EMMA WATSON

The star starts with a basic palette (a simple LBD with a deep-V neckline) and adds excitement via a metal Ferragamo clutch and striped Christian Louboutin pumps at the Bling Ring premiere in N.Y.C.

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

ANNA PAQUIN

In honor of the upcoming return of Sookie Stackhouse, Anna plays up her vampy side in a black David Koma dress with a leather skirt. She draws attention to her jugular with a Jacob & Co. diamond necklace and Melinda Maria earrings at the True Blood Season 6 premiere party in Hollywood.

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

NAOMI WATTS

First read Naomi's stylist's fashion rules, then vote on the actress's blush-colored See by Chloé shirtdress, which she pairs with white ankle-strap sandals at Coach's Summer Party on the High Line in N.Y.C.

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

OLIVIA MUNN

Floral print. Side slit. Peplum. Olivia's red-and-black Max Mara design is a whole lotta look. And we haven't even gotten to her gray Saint Laurent kicks and that metallic clutch, all worn to the Max Mara and W Magazine cocktail party in Beverly Hills.

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

LAUREN CONRAD

From her beehive bun to the sheer layer of tulle over her white Zayan dress, Lauren reminds us a bit of a beach bride. She tops it all off with nude ankle-strap sandals at a signing for her book, Infamous, in L.A.

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

HAILEE STEINFELD

One of the best-dressed teens on the planet steps out in a gray Sportmax dress with black trim and strappy Jimmy Choo sandals at the Max Mara and W Magazine cocktail party in Beverly Hills.

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

KIERNAN SHIPKA

And one of the best-dressed tweens on the planet easily holds onto that title at the same Beverly Hills cocktail party, where she sports a mod dress (with a green skirt and a geometric-print top) that looks straight out of Sally Draper's closet.

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

SOPHIA BUSH

The actress takes a walk on the edgy side in a bronze slightly-sheer top that shows a peek of her black bra, embellished pencil skirt and striped Christian Louboutin pumps (Emma's wearing the same pair!) at the Max Mara and W Magazine cocktail party in Beverly Hills.

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

KOURTNEY KARDASHIAN

The reality star continues her love affair with krazy separates, pairing a dragon-print (yes, that's a thing) pencil skirt with a sheer blouse featuring bell sleeves and blush pumps at the Paper Denim & Cloth and Baby2Baby luncheon in L.A.

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

JORDANA BREWSTER

Now this is a woman who's ready for summer. Jordana wows in a white-and-orange Sportmax floral dress at the Max Mara and W Magazine cocktail party in Beverly Hills.

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

JESSICA CHASTAIN

Golden goddess. That's the first thing that comes to mind when we look at Jessica in this shimmery one-shoulder Lanvin number (unlike anything she's ever worn), selected for the Fashion Institute of Technology Gala in N.Y.C.

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

CAMERON DIAZ

Another fan of the white-on-white trend, Cameron wears top-to-bottom Stella McCartney (a zipper-front dress with voluminous sleeves, strappy sandals and a purple clutch) at the designer's Resort 2014 presentation in N.Y.C.

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

AMY ADAMS

Lois Lane has never looked so sexy! The actress chooses a black strapless Nina Ricci column gown with lace paneling at the back, and adds appropriately retro waves for the premiere of Man of Steel in N.Y.C.

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

DIANE KRUGER

First Carey Mulligan. Then Victoria Beckham. Now Diane Kruger tries the exaggerated sweetheart neckline, wearing it via a Nina Ricci gown with sexy lace accents. She adds red pumps and a golden Jason Wu clutch for the Critics' Choice Television Awards in Beverly Hills.

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

HEIDI KLUM

A plunging neckline and animal print. We're not surprised Heidi Klum chose this Roland Mouret number with its slimming white tuxedo stripe down the side for the Made in NY Awards in N.Y.C.

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

NAOMI WATTS

The actress steps out in what might be the sweetest, girliest jumpsuit we've ever seen. She wears the floral Stella McCartney creation with a gorgeous glow and rather severe black heels to celebrate the designer's Resort 2014 presentation in N.Y.C.

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

EMMY ROSSUM

The Shameless star matches the red carpet, but manages to seriously stand out thanks to a beaded Naeem Khan gown with a keyhole cutout at the back. She really brings the old Hollywood glamour home with a bold lip and sleek waves at the Critics' Choice Television Awards in Beverly Hills.

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

SARAH JESSICA PARKER

Does SJP look spot on in this full-skirted polka-dot dress or does she just leave you thinking of a Dalmatian? The actress adds blush satin pumps to complete the look at the Apollo Spring Gala in N.Y.C.

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

KALEY CUOCO

Is Kaley headed to the ballet? No, but The Bing Bang Theory looks like ready to perform in Swan Lake in her organza Paule Ka dress featuring layers upon layers of tulle and an embellished neckline, selected for the Critics' Choice Television Awards in Beverly Hills.

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

ELISABETH MOSS

It's hard to believe this is the same woman who plays Peggy Olsen, right? The Mad Men actress is all kinds of flirty in this berry-colored RED by Valentino taffeta mini with a flouncy skirt and cleavage-baring neckline, the perfect contrast to her blonde hair at the Critics' Choice Television Awards in L.A.

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

SHAY MITCHELL

Normally, when we think of summer suits, bikinis come to mind, but the actress suits up in a different way: with sky-blue separates over an electric-yellow blouse (all by Naven), which she pairs with metallic Jimmy Choo peep-toes at a Pretty Little Liars event in Beverly Hills.

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

JESSICA ALBA

We thought Jessica was the queen of jeans but turns out she's also the queen of color! The hot Hollywood mom flaunts her figure in a bright yellow Versace minidress, orange Celine pumps and a sexy side-swept do at Spike TV's Guys Choice Awards in Culver City, Calif.

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

TAYLOR SWIFT

Skipping her go-to demure dresses, the singer whips out a pair of Oscar de la Renta short-shorts, which she teams with a billowy blouse also by the designer and black strappy Office sandals at the Capital Summertime Ball in London.

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

JENNIFER ANISTON

Nothing gets in the way of Jen and a good LBD! The actress chooses a strapless mini by Christian Dior with a cascading trim of colorful fabric along one side and matching sandals at Spike TV's Guys Choice Awards in Culver City, Calif.

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

EVA LONGORIA

Eva opts for a chic-yet-sexy black lace dress by Maria Lucia Hohan and ankle-strap Casadei pumps at the YWCA USA Women of Distinction Awards Gala in Washington, DC.

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

LEA MICHELE

Lea's Valentino dress is in full bloom. The actress pairs her floral-print white gown with David Webb bling and voluminous waves at the Chrysalis Butterfly Ball in L.A.

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

SCARLETT JOHANSSON

Scarlett keeps it sleek in this monochromatic look – a black mini with an embellished neckline, fitted blazer and platform pumps (all by Saint Laurent). She adds a deep berry pout for a pop of color at the Tony Awards in N.Y.C.

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

OLIVIA WILDE

These are the sexiest separates we've seen in a while! The actress steps out in a leather belted peplum top with a front zipper, tight black pencil skirt (both by Michael Kors) and Brian Atwood pumps at Spike TV's Guys Choice Awards in Culver City, Calif.

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

SIENNA MILLER

Sienna opts for a curve-hugging coral Burberry dress, nude pumps and a fun floral headband (that we're kind of obsessed with) at the Tony Awards in N.Y.C.

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

AMY ADAMS

Helloooo Amy! The actress clads her frame in a skin-tight metallic L'Wren Scott dress, which she tops with black Casadei pumps and bouncy waves at Spike TV's Guys Choice Awards in Culver City, Calif.

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

ANNA KENDRICK

Believe it or not, this is the same Anna who stepped out in this last week. The actress goes all out in a navy-and-black Donna Karan Atelier gown with sheer paneling on the bodice, cascading ruffles and a head-turning train at the Tony Awards in N.Y.C.

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

HILARY DUFF

Hilary is giving off some serious summer outfit inspiration in her gray BCBGeneration maxi dress, oversized brown belt and studded Isabel Marant boots at the first annual Children Mending Hearts Style Sunday event in Beverly Hills.

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