Last Night's Look: Hit or Miss?

Vote on this week's styles by Blake Lively, Mariah Carey and more stars! You decide – are they fashionistas or flops?

01 of 48

BLAKE LIVELY

BLAKE LIVELY
John Parra/WireImage

Taking her sexy style to the Sunshine State, the Gossip Girl star strikes a pose in a curve-hugging white Christian Cota ruched dress and sapphire patent heels at the grand opening of the W Hotel in Fort Lauderdale.

02 of 48

MARIAH CAREY

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Richie Buxo/Splash News Online

Never one to cover up, the singer bares some skin in a white peekaboo appliquéd column gown by Georges Chakra and loads of diamond jewelry at the Fresh Air Fund Salute to American Heroes in New York City.

03 of 48

KIM KARDASHIAN

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Kevin Winter/Getty

The reality star shows off her famous assets in a corset pencil skirt and trendy sharp-shouldered jacket for The Taking of the Pelham 1 2 3 premiere in Los Angeles.

04 of 48

MICHELLE WILLIAMS

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Demis Maryannakis/Splash News Online

Leaving her adorable daughter home for the evening, the hands-on mom has a grown-up night out in a white dress with gold-beaded shoulder, matching metallic sandals and boxy clutch at the Fresh Air Fund Salute to American Heroes in Manhattan.

05 of 48

NICOLE RICHIE

NICOLE RICHIE
Tonya Wise/London Ent/Splash News Online

Pregnancy isn’t slowing down this hot mama, who hits the red carpet in L.A. for her jewelry line’s runway show in skin-tight black leggings, a matching belly-hugging top, a satin-trimmed short-sleeve cardigan and sky-high gladiator sandals – plus a necklace and hippie headband from her House of Harlow 1960 collection.

06 of 48

ROSARIO DAWSON

ROSARIO DAWSON
Jason LaVeris/FilmMagic

Keeping it casual in a navy minidress, black tights and cap-toe heels, the actress hits a charity event in Los Angeles.

07 of 48

TARAJI P. HENSON

TARAJI P. HENSON
Todd Williamson/WireImage

The Oscar-nominated star cuts an enviable figure in her baby blue belted Black Halo dress, matching clutch and metallic heels for the The Taking of the Pelham 1 2 3 premiere in Los Angeles.

08 of 48

NAOMI CAMPBELL

NAOMI CAMPBELL
Venturelli/WireImage

From the catwalk to the street, the model lives up to her super mannequin status in a ruffled-bottom shift dress, ankle-cuffed metallic heels and luxe diamond necklace at the New Contemporary Art Centre opening in Venice, Italy.

09 of 48

JESSICA BIEL

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James Devaney/WireImage

It’s all about accessories for the star who dresses up her hip-hugging khaki skirt and blousy navy tank with a Tom Binns statement necklace, T-strap platform sandals and a matching denim Prada tote for an appearance on the Late Show with David Letterman.

10 of 48

KATE BOSWORTH

KATE BOSWORTH
Dave M. Benett/Getty

Always the fashionista, the actress shows some subtle skin in a pleated leather and lace neutral dress from Rodarte with matching Nicholas Kirkwood satin pumps and a satin peach clutch for a dinner at London department store Harvey Nichols in honor of Rodarte.

11 of 48

RACHEL BILSON

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JSGS/GSI Media

The label-loving star takes on the Southern California rain in luxe Jimmy Choo for Hunter rain boots, a brightly printed Tolani scarf, green shades and a Pringle of Scotland purse.

12 of 48

KATE WALSH

KATE WALSH
Gaz Shirley/Kevin Perkins/Pacific Coast News

Taking a sweet approach, the TV doctor adds a floral embroidered cap-sleeve top to a matching pencil skirt, satin peep-toes and pink quilted tote for a Dior Beauty luncheon in L.A.

13 of 48

EMMA WATSON

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Dave M. Benett/Getty

Forget the little black dress! The Harry Potter star makes a fashion forward statement in a black leather Rodarte dress with bold blue draped front and white ombré tulle skirt with matching satin shoes at the Harvey Nichols dinner in honor of the brand in London.

14 of 48

ZOE SALDANA

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Marcos Delgado/Zuma

The Star Trek star shows off her supermodel frame in a sweetheart strapless white leather Bottega Veneta pencil dress and black patent pumps for the Mexican photo call for the movie.

15 of 48

VANESSA WILLIAMS

VANESSA WILLIAMS
Charles Eshelman/FilmMagic

What would Wilhelmina say? The Ugly Betty star ditches her crisp on-set high fashion for a sequin belted jumpsuit and puffed-up hair while promoting her album The Real Thing in New York City.

16 of 48

AMY POEHLER

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Landov

Nothing funny here! The comedic star goes glam in a satin sweetheart neck Karen Millen dress with trendy puffed sleeves and matching jeweled Giuseppe Zanotti pumps for the American Women in Radio & Television’s Gracie Awards gala in New York City.

17 of 48

MARISKA HARGITAY

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Robert Pitts/Landov

She may bring down criminals on screen, but off screen the Law & Order: SVU star is the picture of elegance in a ruffled white Carolina Herrera gown with black floral print for the Gracie Awards gala in New York City.

18 of 48

HILARY DUFF

HILARY DUFF
Jemal Countess/WireImage

No bike shorts here! Duff may be announcing the winners of The Bike in Style eco-initiative in N.Y.C., but she stays glamorous in a black-and-white checked sheath accented with a cherry-red clutch, black patent belt and matching open-toed booties.

19 of 48

MARY-KATE OLSEN

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Juan Rico/Fame

For the L.A. premiere of The Hangover, the actress brings the ’60s back, giving John Lennon’s signature glasses her own rose-tinted spin by pairing them with an embellished jewel-print minidress and oversized tuxedo jacket.

20 of 48

ASHLEY OLSEN

ASHLEY OLSEN
Jordan Strauss/WireImage

M.K.’s sister hits the same event with a totally different look, recalling ’90s minimalism with her pared-down black slip dress from The Row, no jewelry and platform sandals.

21 of 48

EVA MENDES

EVA MENDES
Michael Tran/FilmMagic

What says summer better than a flowing floral maxidress? The actress is the picture of the season with a white ruffled halter number and coordinated clutch at the premiere of The Hangover.

22 of 48

AUDRINA PATRIDGE

AUDRINA PATRIDGE
Entertainment Press/Splash News Online

The Hills star goes undercover, leaving behind her signature plunging necklines and microminis for a subtly sexy brown belted frock and strappy gold platforms at the Hangover premiere.

23 of 48

MARION COTILLARD

MARION COTILLARD
Demis Maryannakis/Splash News Online

The Best Actress Oscar winner gets our award for most stylish, attending the Bike in Style Challenge awards ceremony in New York in chic belted suit and matching platform sandals with carved heels.

24 of 48

KATE WALSH

KATE WALSH
Russ Einhorn/Splash News Online

Talk about red carpet sizzle! The actress hits the Hangover premiere in a sexy ruby pencil skirt and purple top by Stella McCartney, Neil Lane jewels, and champagne Sergio Rossi pumps.

25 of 48

KRISTEN BELL

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Jen Lowery/Startraks

Giving lace modern elegance, the Heroes star hits the Hangover red carpet in a plunging Brian Reyes dress, statement necklaces by vintage House of Lavande and Yvel, a Bally clutch and nude Brian Atwood platforms.

26 of 48

KATY PERRY

KATY PERRY
James Whatling/Splash News Online

The singer is tied up in a bow, pairing a strapless teal Foley & Corinna dress with red patent Casadei shoes at the U.K. Glamour Women of the Year Awards.

27 of 48

TYRA BANKS

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Andrew H. Walker/Getty

Scoring high on the fashion bell curve, the supermodel looks runway ready in her structural white frock and chunky sandals at a Calvin Klein event in N.Y.C.

28 of 48

CHLOE SEVIGNY

CHLOE SEVIGNY
Andrew H. Walker/Getty

Making a proportion play at the Calvin Klein event in N.Y.C., the Big Love star tops her short-shorts with a long white Chloé blazer paired with black booties – and an on-trend comb-over that trumps The Donald.

29 of 48

AMANDA SEYFRIED

AMANDA SEYFRIED
Doug Peters/PA Photos/Landov

The Mama Mia star dazzles to accept honors at the Glamour Women of the Year Awards in a ruched printed minidress covered in bright baubles and beads.

30 of 48

SANDRA BULLOCK

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Paul Buck/EPA

Who wouldn’t say “yes” to her? The Proposal star hits the film’s premiere in a black satin Alexander McQueen dress, dramatic necklace and two-tone Bally heels.

31 of 48

KATE WINSLET

KATE WINSLET
Marion Curtis/AP

The star supports her husband, director Sam Mendes, at the N.Y.C. premiere of his film Away We Go in a black Stella McCartney dress with delicate white sleeves.

32 of 48

ASHLEE SIMPSON-WENTZ

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Kevin Mazur/WireImage

The new Melrose Place resident gets leggy in sequined hot pants topped with a black blazer at the DJ Hero videogame launch event in Los Angeles.

33 of 48

ANNE HATHAWAY

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Jose Perez/Splash News Online

The actress flaunts her figure in a skin-tight red bandage dress while leaving Late Night with Jimmy Fallon.

34 of 48

KIM KARDASHIAN

KIM KARDASHIAN
Jordan Strauss/WireImage

The reality star gets into the rock spirit in her zebra-print blazer and distressed jeans at the DJ Hero bash in Los Angeles.

35 of 48

PARIS HILTON

PARIS HILTON
Ray Tamarra/Getty

The heiress visits The Late Show with David Letterman in a nude-and-black Alexander Wang minidress and towering YSL heels.

36 of 48

ALI LARTER

ALI LARTER
Jordan Strauss/WireImage

The Heroes star turns up for another hero – the new game DJ Hero – in second-skin leather pants and a sheer beige top.

37 of 48

HALLE BERRY

HALLE BERRY
Jon Kopaloff/FilmMagic

No wonder fellow presenter Jaime Foxx couldn’t keep his hands – or lips! – to himself. With a new pixie do, a figure-flattering Riller & Fount minidress and Camilla Skovgaard heels the actress is understandably irresistible at the Spike TV 2009 Guys’ Choice Awards in L.A.

38 of 48

CAMERON DIAZ

CAMERON DIAZ
Jeff Kravitz/FilmMagic

Looking ready to shake her booties at the MTV Movie Awards in Universal City, Calif., the actress adds a pair of vivid blue Giuseppe Zanzottis to super-skinny J Brand jeans topped with a printed tunic, Tito Pedrini earrings and an Ippolita ring.

39 of 48

FERGIE

FERGIE
Jun Sato/WireImage

The Dutchess takes it to the Far East for the MTV Video Music Awards Japan, where she hits the red carpet in a ribbon-wrapped minidress, strappy patent platforms and an Ippolita silver gladiator cuff.

40 of 48

KATE HUDSON

KATE HUDSON
J.B Nicholas/Splash News Online

Going incognito at a Veuve Cliquot charity polo match near N.Y.C., the newly brunette actress pairs a flirty white dress with nude sandals, a chic straw hat and the requisite superstar shades.

41 of 48

MILEY CYRUS

MILEY CYRUS
Jeff Kravitz/FilmMagic

Going for grown-up elegance, the teen star slips into a blush Moschino Cheap & Chic halter dress, classic pumps, and jewelry by Robert Lee Morris for Elizabeth and James and Loree Rodkin at the MTV Movie Awards.

42 of 48

LEIGHTON MEESTER

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Axelle/Bauer-Griffin

Gossip Girl’s Queen Bee takes her look in a totally different direction at the MTV Movie Awards, working it in a black cut-out Emilio De La Morena dress, sexy black Brian Atwood booties and Cathy Waterman jewelry.

43 of 48

ASHLEY TISDALE

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Alex Gottschalk/AP

The singer is a damsel in distressed at a German awards show, rocking a stylishly ripped-and-torn T-shirt, black leather pants, studded boots and an arm stacked with bangles.

44 of 48

KRISTEN STEWART

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Jon Kopaloff/FilmMagic

To accept her award for best kiss for her onscreen smooch with Twilight costar Rob Pattinson, the actress is red-hot at the MTV Movie Awards in a punky red-and-black Yigal Azrouël minidress and classic Converse Chuck Taylors.

45 of 48

HAYDEN PANETTIERE

HAYDEN PANETTIERE
Revolutionpix/INF

The star makes sure to sizzle at the Spike TV Guys’ Choice Awards in L.A. in a sparkling micro-minidress, sky-high heels, crystal clutch and tousled blonde waves.

46 of 48

LAUREN CONRAD

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Axelle/Bauer-Griffin

Forgetting her signature knits, L.C. tries out a totally new look at the MTV Movie Awards with a puffed-up midnight blue-and-red Moschino dress.

47 of 48

CHLOE SEVIGNY

CHLOE SEVIGNY
Gene Young/Splash News Online

The Big Love star shields herself from the summer sun with a flower-strewn straw hat, paired with a scalloped beige Chloé short suit at the Veuve Cliquot Manhattan Polo Classic.

48 of 48

SANDRA BULLOCK

SANDRA BULLOCK
Juan Rico/Fame

Balancing her sapphire Abaeté dress with opaque black tights, patent Azzedine Alaia platforms and Gurhan jewels, the actress sparkles on the MTV Movie Awards red carpet.

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