Last Night's Look: Hit or Miss?

Vote on this week's styles including Kim Kardashian, Scarlett Johansson and more stars! You decide – are they fashionistas or flops?

01 of 54

KIM KARDASHIAN

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Evan Agostini/AP

The hits the 2010 Cosmetic Executive Women Beauty Awards in a sexy one-shouldered, coral dress by Rachel Roy and a patterned clutch.

02 of 54

SCARLETT JOHANSSON

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Dimitrios Kambouris/WireImage

Celebrating her time on the Broadway stage, the keeps it simple in a sleek Zac Posen LBD at the 76th Annual Drama League Awards Ceremony and Luncheon.

03 of 54

WHITNEY PORT

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Jason Kempin/Getty

The is the picture of summer in her mini and boyfriend blazer at the CEW luncheon in N.Y.C.

04 of 54

JANET JACKSON

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Matt Crossick/Empics Entertainment/Abaca

Taking some of the focus off her new short do, goes for a sheer-topped gray dress for the London screening of Why Did I Get Married Too?.

05 of 54

ASHLEY TISDALE

ASHLEY TISDALE
Kevin Mazur/WireImage

The sparkles in a sequined platinum Farah Khan minidress and slender clutch at a CW party in N.Y.C.

06 of 54

SARAH JESSICA PARKER

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Doug Meszler/Splash News Online

Looking like she stepped off the set of Sex and the City 2, does her best Carrie Bradshaw impersonation while walking around midtown Manhattan in a sequined Oscar de la Renta dress, robin-red coat, Stephen Russell necklace and golden Alexander McQueen sandals.

07 of 54

KATE BECKINSALE

KATE BECKINSALE
Venturelli/WireImage

Rivaling the glamour of the silver screen, attends the amfAR Cinema Against AIDS gala in Antibes, France in an Armani Privé gown embroidered with platinum sequins, Sergio Rossi pumps and sparkling Chopard diamonds.

08 of 54

MISCHA BARTON

MISCHA BARTON
Benaroch/Sipa

Indulging her love of details, rocks a petal-strewn frock accented with rampant horses at its peekaboo neckline and glitter-sprinkled booties at the Artists for Peace and Justice Haiti benefit at Cannes.

09 of 54

CAMILLA BELLE

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Venturelli/WireImage

The star is elegant in a trailing black Gucci Première dress, crystal clutch and Cartier jewels at the amfAR Cinema Against AIDS gala in Antibes, France.

10 of 54

WHITNEY PORT

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Ivan Nikolov/WENN

Keeping true to the floral theme of ‘Tulips and Pansies: A Headdress Affair’ fashion show event in N.Y.C. chooses a flower-print minidress which she accessorizes with booties and a chain-strap bag.

11 of 54

FERGIE

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INF

What better accent for leather pants than a cropped capelet and fingerless gloves in matching skins? The completes the look with open-toe booties that pick up on the peekaboo theme as she leaves a hotel in Paris.

12 of 54

RACHEL BILSON

RACHEL BILSON
Mike Marsland/WireImage

The is simply chic in feather-adorned navy Chanel dress at the amfAR Cinema Against AIDS gala in France.

13 of 54

MOLLY SIMS

MOLLY SIMS
Jim Spellman/WireImage

A sparkling chemise takes the actress’s jeans and blazer from casual to cool for the Express 30th anniversary party in N.Y.C.

14 of 54

ANNALYNNE MCCORD

ANNALYNNE MCCORD
Dara Kushner/INF

The 90210 vixen is in the pink at an Express party in a rosy Alice + Olivia bustier dress topped off with a white blazer and Rock & Republic heels.

15 of 54

EVA LONGORIA PARKER

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Rex

Playing up her sun-kissed skin in an orange one-shoulder Reem Acra gown and gold accessories, makes an elegant arrival at the White House State Dinner for Mexico.

16 of 54

ASHLEE SIMPSON-WENTZ

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Angela Weiss/Getty

rocks an all-black look, from her alice + olivia by Stacey Bendet frock to her booties and clutch, at the St. Jude Children’s Research Hospital screening of The Empire Strikes Back in L.A.

17 of 54

KATE MOSS

KATE MOSS
John Phillips/Abaca

Who needs pants when you’ve got supermodel stems to stand on? shows off hers at a Topshop launch party in the U.K. wearing just a micro-romper and blazer from her own line for the retailer.

18 of 54

SARAH JESSICA PARKER

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Albert Michael/Startraks

Her hair color might be new, but her iconic style remains the same as the Sex and the City 2 poses at The Early Show in a vivid pink dress and strappy bronze Alexander McQueen sandals.

19 of 54

LILY ALLEN

LILY ALLEN
Ian Lawrence/Splash News Online

Looking ready to hold court, the singer heads into the Ivor Novello songwriting awards (she won three!) in a plunging cream dress with romantic flowing sleeves.

20 of 54

DEMI LOVATO

DEMI LOVATO
INF

is a damsel in distressed as she strolls N.Y.C.’s mean streets in strategically worn jeans topped with a lamé jacket and Rock & Republic sandals.

21 of 54

NAOMI WATTS

NAOMI WATTS
Axelle Woussen/Bauer-Griffin

Cannes is already glittering with stars, but brings even more of her high-wattage style to the French film festival in a dusty rose RM by Roland Mouret dress and ankle-wrap sandals.

22 of 54

HILARY DUFF

HILARY DUFF
Flynet

makes a pattern play as she leaves an L.A. salon in a micro-print romper encircled with a green belt, a periwinkle cardigan and nude booties.

23 of 54

NICOLE KIDMAN

NICOLE KIDMAN
Kin Cheung/AP

Proving the power of the LBD, attends a press conference in Hong Kong in a simple Nina Ricci sheath dress, golden Pierre Hardy sandals and scarlet lips.

24 of 54

JENNIFER LOPEZ

JENNIFER LOPEZ
Axelle Woussen/Bauer-Griffin

gets seriously sexy in a plunging, stamped gray leopard Roberto Cavalli gown, mounds of diamond jewelry and an exotic Daniel Swarovski clutch for the World Music Awards in Monaco.

25 of 54

TAYLOR SWIFT

TAYLOR SWIFT
Mark Sullivan/WireImage

Country’s ultimate sparkles in a sequined top Alice + Olivia frock, Neil Lane jewels and coordinating gold accessories at the Pop Awards in Beverly Hills.

26 of 54

MICHELLE WILLIAMS

MICHELLE WILLIAMS
Francis Specker/Landov

takes a relaxed approach to high-fashion in a beaded pink Chanel Haute Couture gown at the Blue Valentine after party in Cannes.

27 of 54

HAYDEN PANETTIERE

HAYDEN PANETTIERE
Tony Barson/WireImage

The works her curves in a clingy Emilio Pucci mini, nude peep-toes and a gold clutch at the World Music Awards in Monaco.

28 of 54

SCARLETT JOHANSSON

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Jimi Celeste/Patrick McMullan/Sipa

The keeps things simple in a blush-and-nude scalloped 3.1 Phillip Lim sheath dress and tan sandals at the New Dramatist luncheon in N.Y.C.

29 of 54

KATE BECKINSALE

KATE BECKINSALE
Hahn-Nebinger-Orban/Abaca

It’s just another glamorous Cannes party for , who turns up in a sheer-hemmed, black beaded dress to the chic Chanel bash.

30 of 54

MARION COTILLARD

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Ramey

She doesn’t need a red carpet to get glam! The French actress is daytime chic in a scarlet halter dress and gold glittered Christian Louboutin heels while out in Cannes.

31 of 54

RACHEL BILSON

RACHEL BILSON
Francois Durand/Getty

The famous joins Hollywood’s glitterati in Cannes rocking a belted, spotted dress, beaded purse and black pumps at the Blue Valentine after party.

32 of 54

KATHARINE MCPHEE

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Splash News Online

The is sweet in a floral, ruffled mini dress and tan platform sandals at the Nyx Cosmetics event in Hollywood.

33 of 54

JESSICA LOWNDES

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Michael Tran/FilmMagic

The 90210 starlet is party perfect in a bustier-topped ruffled frock, chain-link statement necklace and peekaboo pumps at the Nyx Cosmetics event in Hollywood.

34 of 54

LEA MICHELE

LEA MICHELE
Peter Kramer/AP

Glee’s leading lady sheds her good-girl image with a dramatic bun, sultry scarlet lips and a puffed-sleeved minidress for the FOX 2010 Programming Presentation in N.Y.C.

35 of 54

MICHELLE WILLIAMS

MICHELLE WILLIAMS
John Shearer/WireImage

Debuting a new cropped do, adds to the glitz and glam of Cannes with a printed gray Suno frock and Stella McCartney platform sandals at the Blue Valentine photocall.

36 of 54

KATE BECKINSALE

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James McCauley/Rex

The glamorous gets edgy in Cannes in a sharp-shouldered, slit-to-there Balmain sequined gown cinched with a studded corset belt and Chopard earrings for the Biutiful premiere.

37 of 54

MARION COTILLARD

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Matt Baron/BEImages

The French goes high-fashion in a sparkling LeFranc Ferrant jumpsuit paired with sheer booties and purple layered Chopard necklaces at Chopard’s 150th Anniversary Party in Cannes.

38 of 54

AMERICAN FERRERA

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Demis Maryannakis/Splash News Online

Sticking to the classic LBD, adds exotic peep-toe pumps to her puff-sleeve James Coviello sheath at the Restoration Project’s Annual Spring Picnic in N.Y.C.

39 of 54

DIANNA AGRON

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Evan Agostini/PictureGroup

Leaving her Cheerio uniform behind, the Glee star is Hollywood hot in a crimson Michael Kors peplum sheath and strappy metallic sandals at the FOX 2010 Programming Presentation in N.Y.C.

40 of 54

GEMMA ARTERTON

GEMMA ARTERTON
Toby Canham/Bauer-Griffin

might be the Prince of Persia, but the actress is every bit the royal in a nude Elie Saab gown and Cartier jewels at the movie’s L.A. premiere.

41 of 54

JAYMA MAYS

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Splash News Online

The Glee guidance counselor shows her sexier side in a plunging blue Brian Reyes dress, metallic sandals and white patent Jimmy Choo clutch at the FOX 2010 Programming Presentation in N.Y.C.

42 of 54

MICHELLE MONAGHAN

MICHELLE MONAGHAN
Jon Kopaloff/FilmMagic

The actress stuns in a navy beaded Andrew Gn minidress and patent platforms from the designer at the L.A. premiere of Prince of Persia: The Sands of Time.

43 of 54

KERI RUSSELL

KERI RUSSELL
RAM/Fame

Covering up in a black-and-white checked coat, the TV star adds sweet white peep-toes for the FOX 2010 Programming Presentation in N.Y.C.

44 of 54

MARY-KATE OLSEN

MARY-KATE OLSEN
Flynet

Sticking to all black, the adds an eagle-embossed shoulder bag and chunky patent wedges for the Free Arts Annual Auction in N.Y.C.

45 of 54

CAMERON DIAZ

CAMERON DIAZ
Sara De Boer/Startraks

gets sexy in a red-hot Oscar de la Renta minidress, nude pumps and a matching crimson pout at the L.A. premiere of Shrek Forever After.

46 of 54

NAOMI WATTS

NAOMI WATTS
PA Photos/Landov

The gets all glammed up in a sparkling pale pink Gucci Première gown, Chopard jewels and loose curls for the Cannes Film Festival premiere of You Will Meet A Tall Dark Stranger.

47 of 54

JENNIFER HUDSON

JENNIFER HUDSON
John Shearer/WireImage

A slimmed-down shows off her figure in a draped Alexander McQueen cobalt dress and ankle strap sandals at the Winnie cocktail party in Cannes.

48 of 54

JENNIFER LOPEZ

JENNIFER LOPEZ
Dave M. Benett/VF1/WireImage

Adding star power to Cannes, arrives in style in a one-of-a-kind gray Gucci frock – with organza ruffle shoulder detail – for the Vanity Fair and Gucci Party.

49 of 54

MILEY CYRUS

MILEY CYRUS
Amy Graves/WireImage

The adds tough edge to her silky blush dress with a leather jacket and peep-toe booties at the Hannah Montana wrap party in L.A.

50 of 54

SALMA HAYEK

SALMA HAYEK
Venturelli/VF1/WireImage

Keeping up her label loyalty, shines in a one-of-a-kind bronze paillette-covered dress by Gucci at the Vanity Fair and Gucci party in Cannes.

51 of 54

KATE BECKINSALE

KATE BECKINSALE
Venturelli/VF1/WireImage

Taking a classic approach, stuns in an off-the-shoulder black Gianfranco Ferré gown at the Vanity Fair and Gucci Party at the Cannes Film Festival.

52 of 54

CAMILLA BELLE

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Dave M. Benett/VF1/WireImage

It’s all about the glitz and glam for Camilla, who sparkles in a one-of-a-kind gunmetal Gucci dress with Swarovski stones, beads and sequins plus Cartier jewels at the Vanity Fair and Gucci Party at the Cannes Film Festival.

53 of 54

LAKE BELL

LAKE BELL
Todd Williamson/WireImage

The actress makes for a bright spot on the Shrek Forever After green carpet in a sunny yellow Lyn Devon top, formal shorts and black-and-white sandals.

54 of 54

EVANGELINE LILLY

EVANGELINE LILLY
Bauer-Griffin

Adding a shock of color to the Cannes Film Festival, the Lost star stuns in ombré Emilio Pucci and Chopard jewels at the You Will Meet A Tall Dark Stranger premiere.

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