Last Night's Look: Hit or Miss?

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KATE BECKINSALE

Talk about glam! literally sparkles in an off-white and silver embroidered Gucci Première gown and Chopard diamonds at the debut of Il Gattopardo in Cannes.

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SALMA HAYEK

After debuting Gucci Première a day before, follows up with another red-hot, slit-to-there gown from the new couture line at the Cannes premiere of Il Gattopardo.

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CAREY MULLIGAN

The blonde starlet is simply elegant in a crystal-topped Azzaro gown at the Cannes premiere of Wall Street 2: Money Never Sleeps.

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CAMILLA BELLE

Proving her style star status, Camilla dons an asymmetrical navy gown from Gucci’s new Première couture line – topped with a sexy scarlet pout – at the Cannes premiere of Il Gattopardo.

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ASHLEY GREENE

All eyes are on the vixen’s peekaboo dress, which she pairs with Irit Design jewelry and peep-toe pumps at the Young Hollywood Awards in L.A.

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EVA LONGORIA PARKER

Old Hollywood glamour arrives at Cannes as sparkles on the red carpet in a trailing platinum gown and diamond-drop earrings.

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KATE HUDSON

Almay’s newest ambassador shows off fresh face at a Concert to Celebrate the Rainforest Fund in N.Y.C. in a classic black-and-cream suit ensemble, Cartier jewels and sky-high platinum platforms.

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EMMA ROBERTS

As her skirt goes short, her sleeves go long! niece accents her gray minidress with a chic clutch and platform peep-toes.

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JESSICA STROUP

“A lot of people don’t recognize me,” the 90210 star tells PEOPLE of her new cropped do which she debuted at the JCPenney-sponsored Young Hollywood Awards in L.A., where she rocked a lamé miniskirt and black blouse with Simon G. Jewelry.

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CAREY MULLIGAN

A simple RM by Roland Mouret sheath and elegant booties let the actress’s star power shine during a photocall for Wall Street: Money Never Sleeps in Cannes, France.

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SOPHIA BUSH

Taking her independent fashion sense to the maxi, Sophia wears a floor-sweeping metallic dress and chunky jewelry at an Ann Taylor preview in West Hollywood, Calif.

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ASHLEY OLSEN

The adds a wild touch to her all-black ensemble by draping her neck with a leopard-print scarf at the Matthew Williamson event in N.Y.C.

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NIKKI REED

Bringing a little sparkle to the Young Hollywood Awards, Twilight saga star Nikki slips into in a nude tulle dress sprinkled with sequins and Simon G. Jewelry.

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KELLY OSBOURNE

The Dancing With the Stars alum takes her patterned dress to new lengths at the Matthew Williamson event in N.Y.C.

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KATE BECKINSALE

swirls onto the red carpet at the Cannes premiere of Robin Hood in a confection of frothy tulle by Marchesa.

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VANESSA HUDGENS

The gets slinky at the Nylon Young Hollywood party in a silky purple minidress and diamond cut-out shoes – and tops off the look with a seen-everywhere chignon.

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CATE BLANCHETT

Leaving her custom Maid Marion boots on the Robin Hood set, pays homage to Alexander McQueen at Cannes in an eagle-embellished gown by the late designer.

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EVA LONGORIA PARKER

The sparkles at the Cannes premiere of Robin Hood in a nude Elie Saab minidress embellished with bands of glittery paillettes.

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WHITNEY PORT

As one of Hollywood’s successful design stars, brings her fashion savvy to a Nylon party in a canary-yellow Rachel Roy dress, embellished booties and a chain-strap bag.

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SALMA HAYEK

The dazzles at the Robin Hood screening at Cannes in a burgundy Gucci Premiere gown accented with jewels at the shoulder and hip.

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ASHLEY GREENE

Rocking a ruched yellow D&G minidress with peep-toe platforms, the star shows what young Hollywood is all about at a Nylon event.

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CHLOË SEVIGNY

The Big Love star gets kitted-out in a black leather minidress and oversized jacket to catch an Iggy Pop gig in celebration of Ray-Ban Aviator: The Essentials event.

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ASHLEY TISDALE

The straddles pretty and edgy by topping a girly floral dress with a tough leather jacket at a Nylon party in Hollywood.

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KRISTIN CAVALLARI

Leading the ’90s revival, poses at a Nylon party in Hollywood in a white peekaboo tank dress by Caroline Hedaya, golden Raphael Young platforms and mall-queen hair.

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KIM KARDASHIAN

The shows off her Virgin, Saints and Angels bling against a sheer-topped cream minidress and gold gladiator platforms at the Kitson launch of the line in Hollywood.

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AMANDA SEYFRIED

Playing up her baby blues, the actress stuns in a RM by Roland Mouret fan-embellished mini for the L.A. premiere of Letters to Juliet.

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CATE BLANCHETT

The Oscar-winning goes high fashion in an icy pink Giorgio Armani Privé cocktail ensemble and matching heels for the Cannes Film Festival premiere of Robin Hood.

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DIANE KRUGER

With her best accessory – boyfriend Joshua Jackson! – by her side, the style star sparkles in black sequins at the Chanel Cruise Collection presentation in Saint-Tropez, France.

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KATE BECKINSALE

Approaching her role as a Cannes Film Festival judge with style, gets glamorous in a plum dress, nude patent pumps and an amped-up ponytail.

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RIHANNA

Letting her fierce fashion sense out to play, goes clubbing in London, rocking a plunging gray top and black-and-white leggings.

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TERI HATCHER

Brightening up a gloomy N.Y.C. morning, the Desperate Housewives strikes a pose outside The Morning Show in a bold blue dress and metallic pumps.

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MICHELLE TRACHTENBERG

Michelle gets sexy in print-topped dress, jeweled statement necklace and metallic pumps at a Victoria’s Secret party in Hollywood.

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MARY-KATE OLSEN

The pint-size shows off her wild side in a leopard print top, black trouser pants and fringed Jimmy Choo clutch at the premiere of Holy Rollers in N.Y.C.

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JENNIFER LOPEZ

After a glamorous world tour, the relaxes in style, wearing a pleated white-and-tan vintage Prada frock and Lanvin tulle-topped flats while vacationing in St. Tropez, France.

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ASHLEY OLSEN

Lending her stylish support, turns up at boyfriend Justin Bartha’s Holy Rollers premiere in pleated trousers topped with a white button-down, embroidered jacket and exotic purse.

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CATHERINE ZETA-JONES

The Broadway goes Hollywood hot on the arm of her movie star husband Michael Douglas, in a one-shoulder scarlet dress and gold accessories for a charity event in Manhattan.

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UMA THURMAN

Slipping into silky purple dress, long cardigan and strappy sandals for an appearance on Late Show with David Letterman, the actress cuts a stunning figure on New York’s city streets.

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DIANE KRUGER

The face of Calvin Klein’s fragrance Beauty lives up to her new role, highlighting her natural good-looks in a Chanel high-waisted skirt, cut-out tank, fedora and frill-trimmed sandals.

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MALIN AKERMAN

Rocking a fashion-forward Bally jacket with super-skinny – and super-shiny – leggings, the actress attends the Haute and Bothered launch party in high style.

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KERRY WASHINGTON

The actress accents her vivid purple lace frock with a black jacquard coat, chic clutch and platforms while arriving at a Robin Hood Foundation event in N.Y.C.

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EVANGELINE LILLY

Lost’s sexy star has found the secret to style in a tiered scalloped lace J.Crew Collection dress, platform Stuart Weitzman sandals and hold-everything hobo while heading to the Late Show with David Letterman.

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KIM KARDASHIAN

The is white hot at BFF Lala Vasquez’s bachelorette party in Las Vegas in a curve-hugging dress and high ponytail.

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AUDRINA PATRIDGE

brings her sizzle poolside, celebrating her birthday at Aria in Las Vegas in a black halter minidress and golden platform sandals.

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KATY PERRY

The is feeling blue at the P.S. Arts Presents The Bag Lunch event in L.A. in a micro print dress and nude pumps.

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SOPHIA BUSH

Heeding the call of the wild, the actress attends the Race to Erase MS event in L.A. in a floor-grazing wild-cat print Monique Lhuillier chiffon gown with thigh-high slit.

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JESSICA LOWNDES

“I wanted to go for kind of like a ballerina bun and just keep it sleek,” the 90210 star told PEOPLE of the hairstyle she chose to counterbalance the ruffled and tiered BCBG dress that she wore to the Race to Erase MS gala in L.A.

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MARY J BLIGE

Hollywood’s newest perfumer brings a little extra glamour to the Urban League’s Stronger: Girls’ Empowerment Day in N.Y.C. in a flowing black-and-white asymmetrical frock.

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GEMMA ARTERTON

She might be starring right alongside scene-stealer Jake Gyllenhaal in Prince of Persia: The Sands of Time – but a stunning sequined tulle Valentino gown guaranteed that all eyes would be on the actress at the film’s London premiere.

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