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

NINA DOBREV

Clad in a Thakoon dress with a skin-revealing black-and-white bodice and Jimmy Choo sandals the Vampire Diaries star looks summer date-night ready at an Origins event in N.Y.C.

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

NICOLE RICHIE

Nicole opts for a bright, embroidered Balmain mini with gray pumps and shows off her chic bangs (which her husband just noticed) at a dinner party for the French fashion label in L.A.

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

ZOË SALDANA

We can't decide if we like this dress better from the front or the back. Zoë stuns in a Vionnet embellished bodice gown with a white high-low skirt and dramatic open back. She tops off her look with over $130,000 worth of Tiffany & Co. jewels at the Star Trek Into Darkness premiere in London.

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

KATY PERRY

All hail the queen of roses! Apparently it's too difficult for Katy to stand in this voluminous rose-printed embroidered dress by Thom Browne. (We can't believe this is the same designer who made Michelle Obama's Inaguration looks!) The singer styles her look with Alice + Olivia heels, Lorraine Schwartz bracelets and Chopard danglers at the launch of her third fragrance Killer Queen in N.Y.C.

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

ROSIE HUNTINGTON WHITELEY

Another Balmain beauty! Rosie wears funky separates to the label's L.A. dinner party including a cropped padded-shoulder leather top with front pockets and a multi-print black-and-white mini skirt with open-toe cage booties. Yeah, it looks as complicated as it sounds.

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

JANELLE MONAE

It's no surprise that the singer, who's a fan of androgynous fashion, rocks one of the big spring trends – a monochromatic pants suit. She chooses a Topshop white blazer with black trim and matching wide-leg trousers for an appearance on BET's 106 & Park in N.Y.C.

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

JULIANNE HOUGH

Julianne's single-girl style is red hot. The actress wears a tea-length Carolina Herrera design with a structured bow in the back and Stuart Weitzman heels at the 6th Annual EIF Women’s Cancer Research Fund event in L.A.

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

MENA SUVARI

The feathers on Mena's Amen Couture gown complement her 1970s bombshell blowout at Operation Smile's 30th Anniversary Celebration in N.Y.C. The actress pairs her curve-hugging, sequin-bodice dress with emerald danglers and a black box clutch.

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

JULIANNE MOORE

We want the Oscar winner to adopt us just so we can play in her closet. She looks elegant in a long-sleeved Valentino dress with lace detail and black strappy sandals at the screening of What Maisie Knew in N.Y.C.

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

ZOSIA MAMET

Shosh, are you in there? The Girls actress leaves her character's girlie wardrobe at work and steps out in a psychedelic maxi with a black ribbon belt at the waist to the screening of What Maisie Knew in N.Y.C.

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

CARLY RAE JEPSEN

Check Carly out! The signer wears a checkered black-and-white mini (that reminds us of the NASCAR flag) and a bold red blazer with leather lapels, both by Missguided, plus clunky Ruthie Davis pumps and cat-eye sunnies for a radio interview in N.Y.C.

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

KATY PERRY

Never afraid of wearing tons of color, the singer selects a damask-print Vera Wang Collection mermaid gown in blue for the Delete Blood Cancer DKMS Gala in N.Y.C., then adds major amethyst danglers, a raspberry lip and bold red nails.

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

CAREY MULLIGAN

The belle of the The Great Gatsby ball stuns in a strapless red Lanvin dress and Brian Atwood platform sandals at the N.Y.C. premiere of the hotly-anticipated flick. Her accessories may look minimal, but she's iced in $130,000 worth of platinum Tiffany & Co. jewelry.

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

NINA DOBREV

The Vampire Diaries star attempts to one-up Daisy Buchanan at the N.Y.C. premiere of The Great Gatsby in a beaded Versace mini and coordinating gold Rupert Sanderson pumps with a head-turning crystalized heel. She finishes off her look with a Jimmy Choo clutch and those flawless, cascading locks.

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

OLIVIA WILDE

Olivia takes a walk on the wild side in another sheer creation, a green animal-print, long-sleeve Max Mara dress cinched at the waist, accessorized with a House of Lavande Vintage necklace, Iwona Ludyga Designs earrings, an Anya Hindmarch clutch, and black strappy Stuart Weitzman sandals for the Whitney Museum's Annual Art Party in N.Y.C.

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

ISLA FISHER

We predict that Isla's Dolce & Gabbana dress will have a few haters, but there's no denying the design (made up of a sheer navy bodice and black lace skirt) is interesting. She pairs the look with Fred Leighton jewels, Dolce & Gabbana heels and a Roger Vivier clutch, begging the question: How many amazing designers can one woman wear?

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

FLORENCE WELCH

Ahoy, Florence! The singer stays true to her personal style in an outfit that feels like a cross between a sailor and a flight attendant, a navy Miu Miu gown with a beaded collar and neck scarf. She wears it to the N.Y.C. premiere of The Great Gatsby along with a royal-blue, gold-framed Miu Miu bag.

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

HEIDI KLUM

Gasp! Is Heidi in a dress that's not a mini? After a string of shorter-than-short looks, the supermodel opts for a piece by Thomas Wylde that's a tad more conservative while promoting Clear Scalp and Hair Therapy shampoo in L.A. Not to worry, though: She sexes up the look with sky-high stilettos.

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

KRYSTEN RITTER

Buzz buzz. The actress's bee-inspired ensemble, a canary-yellow blazer and black Kate Spade Saturday dress, is giving us some serious style inspiration. She tops off the look with a pair of black loafers at the Frances Ha screening in L.A.

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

JENNIFER MORRISON

Jen looks like she stepped out of the 1920s in this cream lace Dolce & Gabbana frock with billowy shoulders and a flouncy hem. (Appropriate, considering she's at The Great Gatsby premiere in N.Y.C.) To complete her retro look, she adds Saint Laurent platform pumps and House of Lavande Vintage baubles.

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

KATY PERRY

Hard to believe this is the same singer who used to wear cupcake bras, right? Katy opts for a demure, wine-hued Prada dress at an N.Y.C. exhibition of costumes designed by Miuccia Prada for The Great Gatsby, topping off the outfit with bowed, floral Prada shoes.

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

JENNIFER ANISTON

Still not heeding our style advice (sigh), a glowing Jen dons another LBD at the Hollywood launch for her yoga teacher Mandy Ingber's new book. The actress shows off the body Ingber helped create in the plunging number with strappy black sandals and minimal jewelry.

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

KATE BECKINSALE

Joining Jen at Mandy Ingber's book launch in Hollywood, another one of the yogi's clients gives us figure envy in a one-shoulder Monique Lhuillier black dress, accessorized with a black Ben-Amun cuff, IritDesign earrings and trendy Rupert Sanderson white pumps for a fresh spring feel.

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

CAREY MULLIGAN

The Great Gatsby's leading lady wears a long-sleeve, embroidered Prada design with ruffled shoulder details (and almost no makeup!) to Miuccia Prada's dress exhibition in N.Y.C.

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

ZOOEY DESCHANEL

Zooey shows off an unexpected slice of skin in a black crop top and high-waisted striped skirt at a New Girl screening in Hollywood. What? Did you think the actress would ditch her tights and black pumps just because it's spring?

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

NICOLE RICHIE

We know, it's hard to get past this hair. But let's focus on her outfit for the time being. Nicole looks straight out of the '70s in a long-sleeve beaded Saint Laurent mini (and yes, more white pumps) at the AOL's Digital Content NewFront in N.Y.C.

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

MAGGIE GYLLENHAAL

We're happy to see Maggie swap her Birkenstocks and maxis for this glam look, a long-sleeve Prada dress with ruffles, strappy platform sandals and danglers at the Miuccia Prada and Great Gatsby event in N.Y.C.

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

ISLA FISHER

Hey Isla, can we please borrow this dress for an upcoming bridal shower? The actress steps out in a mod, light-pink Prada mini with a while collar and black accessories at The Great Gatsby party in N.Y.C.

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

SARAH JESSICA PARKER

The working mom is an old pro at looking effortlessly put-together on the red carpet. SJP wears an embroidered white knee-length dress and olive pumps for AOL's Digital Content NewFront bash in N.Y.C. Our favorite piece of the outfit, though: that sparkling statement necklace.

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

EVA LONGORIA

Another fan of the LWD, the flawless Eva pairs her scalloped-hem mini with studded cream platforms and a white-and-gold clutch at a Ferragamo launch in N.Y.C.

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

KATE MOSS

Judging by this outfit, a night out with Kate Moss is everything we've imagined...and probably much more. The supermodel goes all out for a friend's surprise birthday party in London wearing a black rhinestone-adorned mini, fur coat, sequin pumps and one hell of an updo.

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

ASHLEY MADEKWE

We're not sure if we're brave enough to try Ashley's checkered overall-esque Topshop jumpsuit, but we're glad she went for it. The British actress makes the bold style choice for BAFTA L.A.'s British New Wave event.

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

ZOË SALDANA

It takes a woman with perfect legs to wear an unforgiving tulip skirt like this one – and Zoë is that woman. She wears the mini with a sequin top (both Balmain) and netted Christian Louboutins to the Star Trek Into Darkness premiere in Berlin.

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

DUCHESS CATHERINE

The mum-to-be doesn't give any clues as to the sex of her baby with this outfit, but we love it anyway. She dons a peach-hued coat by Tara Jarmon over a dress in the same color family, plus her favorite LK Bennett heels, at a visit to Naomi House Children's Hospice in Winchester, England.

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

KELLY OSBOURNE

The TV host hits the CLEO magazine launch party in Sydney wearing a halter mini with a sheer overlay, along with coordinating accessories and her signature lavender beehive.

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

PORTIA DE ROSSI

More sheer done right. Portia brings the sexy in a snake-print Jenny Packham design and Casadei heels at Netflix's Arrested Development Season 4 premiere in L.A.

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

WINONA RYDER

Winona gets back to basics in a V-neck Zac Posen LBD, Kwiat jewels, black pumps and a bold red lip for the N.Y.C. premiere of her new movie The Iceman. (We're just glad she left these shoes at home.)

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

CHRISTINA RICCI

She's a fan of white shoes – along with everyone else in Hollywood! Christina pairs her summery pumps with a structured black pencil skirt and a casual beige tee at the Family Equality Council's Night at the Pier in N.Y.C.

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

EMILIA CLARKE

The Queen of Dragons has transformed into the Queen of Chic. The star of Broadway's Breakfast at Tiffany's appears to be inspired by Holly Golightly in a belted Christian Dior dress and Christian Louboutin accessories at the Actor's Fund Annual Gala in N.Y.C.

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

AMANDA PEET

We want to be invited to Amanda's pants party. The actress wears the cool printed black-and-white trousers with a beige topper and Smythson clutch to the Arrested Development premiere in L.A.

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

JENNIFER LOPEZ

Just when we were getting ready for LWD season, J.Lo gives us LBD envy. She wears her halter mini with a perky pony, stacked ankle-strap Brian Atwood heels, coral lips and a golden clutch to the opening of Hakkasan nightclub in Vegas.

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

OLIVIA WILDE

Another kind of LBD (that would be long brown dress) we'd love to own. Olivia wears the plunging (in the front and back!) Valentino gown and equally dramatic headband to a cocktail reception after the White House Correspondents Dinner in D.C.

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

ZOË SALDANA

Toned arms, amazing abs, killer legs. Yep, this Calvin Klein Collection ensemble featuring a cropped tank and a perforated knee-length skirt reveals all of Zoë's best assets at the Star Trek Into Darkness premiere in Berlin. And her funky Jimmy Choo sandals show off her great taste in shoes.

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

SELENA GOMEZ

Warm weather never stopped anyone including Selena from breaking out the leather. She wears the second-skin tee to the Radio Disney Music Awards in L.A. with a Blumarine mini that boasts plenty of on-trend volume at the hips, plus Nicholas Kirkwood heels.

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

KATE BOSWORTH

No, you didn't take a time machine back to Old Hollywood; you're just looking at a photo of the actress at the Big Sur premiere at the San Francisco International Film Festival, where she stuns in a black Oscar de la Renta dress with a jeweled belt and sheer gathered neckline, plus a Devi Kroell clutch, classic red lip and gorgeous waves.

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

ISLA FISHER

To celebrate her Gotham magazine cover at a party in N.Y.C., the actress selects a golden brocade Pierre Balmain mini under a satiny boyfriend blazer, both pieces worthy of celebration themselves.

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

VANESSA HUDGENS

Coachella seems like a distant memory when we see Vanessa at the Hakkasan opening in Vegas wearing a glam beaded AllSaints mini and studded pointy-toe pumps.

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

JULIANNE MOORE

Redheads, take note: You'll look amazing in a bold purple Alexander McQueen dress like Julianne's ruffled design, which she pairs with peep-toe booties and an embossed clutch to The English Teacher after-party during the Tribeca Film Festival in N.Y.C.

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

JESSICA PARÉ

One of PEOPLE's favorite people, the Mad Men star attends the PEOPLE/TIME party before the White House Correspondents Dinner in a unique gold-and-black L'Wren Scott number that somehow feels both timeless and edgily modern.

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

NICOLE KIDMAN

Eschewing the go-to dark shades of the evening, Nicole hits up a post-White House Correspondents Dinner party in a lilac beaded and crystal-embellished Emilio Pucci gown with short sleeves and an open back, plus a Bottega Veneta clutch.

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