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

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KRISTEN STEWART

From her edgy eye makeup to her biker-inspired Barbara Bui sandals, the works her tough-girl side in an A.L.C. leather mini and beloved Iwona Ludyga bracelet.

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KIM KARDASHIAN

The poses in a dress with her three favorite elements (short, tight and shiny) at her Kardashian Kollection for Dorothy Perkins launch in London.

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DUCHESS CATHERINE

Hey, that dress looks familiar! The wears a recycled Temperley London gown with a bright red clutch to a benefit at her alma mater, the University of St. Andrews.

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CHRISTINA AGUILERA

The contestants on The Voice may have powerful pipes, but it’s this look (bold dip-dyed strands, graphic tee and Frankie B. jeans, plus skull-adorned heels) that’s really loud.

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MARION COTILLARD

The French actress wore yet another Dior creation – this time a nude dress with a sheer overlay featuring a graphic black sequined patterned – to a screening of Rust and Bone in N.Y.C.

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KATHARINE MCPHEE

Equal parts sweet and sexy in a flared Nonoo mini, embroidered black sheer button-up and booties, the attends the Malaria No More International Honors in New York.

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LUCY LIU

At the Women for Women International Gala in N.Y.C., accessorizes her navy Roland Mouret gown with glam touches including Wilfredo Rosado gems, a sequined clutch and a pulled back ‘do.

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OLIVIA PALERMO

Outfit #124 that we’d like to steal from Olivia: Her navy military blazer, brown skinnies, bright blue pumps and teal bag – which she dons to Savannah Miller’s ‘Savannah’ launch in London.

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ALLISON WILLIAMS

Yet another reason we’re loving her style: The Girls star chooses an elegant strapless A-line knee-length design, and cap-toe pumps for the Stand Up for Heroes event in N.Y.C.

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CHRISTINA HENDRICKS

The Ginger and Rosa star embraces one of fall’s hottest hues, oxblood, on a belted turtleneck Tommy Hilfiger dress with an attached cape. She adds black pointed heels and rings by Carla Amorim and H. Stern at the film’s Beverly Hills screening.

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CAMERON DIAZ

In a chic Stella McCartney party dress with a plunging neckline, plus a black clutch, strappy heels, and Pomellato jewelry, the gets festive for the Netflix-sponsored London premiere of Gambit.

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RIHANNA

Giving the Angels a run for their money, the shows off her own fab figure in head-to-toe Miu Miu before performing at the Victoria’s Secret fashion show in N.Y.C.

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KEIRA KNIGHTLEY

Echoing the romantic vibes of her film Anna Karenina, the makes a sweeping statement at the film’s N.Y.C. screening in an embroidered black Valentino Haute Couture gown and ruby red lips.

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CHRISTINA HENDRICKS

To offset the seriously sexy vibes of her glittering black square-neckline L’Wren Scott sheath, the star pins a flirty hairpiece into her red locks and adds black Jimmy Choo heels for the Hollywood screening of her film Ginger and Rosa.

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ELLE FANNING

At the same Hollywood screening, the actress goes girlie in a green striped Oscar de la Renta gown, a white headband and matching Marni bangles.

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MIRANDA KERR

Gearing up to bare just a little bit more on the Victoria’s Secret runway, the model shows off her famous physique in a daring black Balmain mini, sheer booties and a studded clutch (both by Jimmy Choo).

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KERRY WASHINGTON

No Scandal here: the actress looks simply elegant in a rich magenta Temperley London gown and dangling sparklers for the BAFTA L.A. Britannia Awards in Beverly Hills.

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NIKKI REED

With Twilight fever amping up, the film’s star makes the rounds – stopping by MTV in N.Y.C. wearing a blouse and pants (both by A.L.C.) with a delicate pendant and black Jimmy Choo booties.

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VANESSA HUDGENS

Taking the “sexy” dress code seriously, the opts for thigh-highs, suede boots, a black mini and leopard coat (plus a Dana Rebecca Designs ring) at the N.Y.C. Victoria’s Secret show.

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OLIVIA MUNN

Also toasting the Brits at the Beverly Hills BAFTA party, the actress opts for an ombré gold sequin Temperley London dress with a coordinating Swarovski clutch and Aruna Seth pumps.

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TAYLOR SWIFT

The is across the pond to switch on Westfield London’s Christmas lights, but who needs bulbs when she’s wearing such a dazzling outfit (an off-the-shoulder party dress in her favorite color, plus nude pumps and a House of Lavande vintage bracelet)?

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OLIVIA PALERMO

Also in the U.K., the socialite kicks off Liverpool’s Harvey Nichols Beauty Bazaar in a cowlneck jacket worn over a sparkling top, leather leggings and cobalt heels.

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MISCHA BARTON

We’re wondering how she packed all these hats in her luggage! The actress attends another event in Melbourne, Australia, wearing a statement topper paired with a striped, full-skirted dress and black heels.

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HELENA CHRISTENSEN

The model shows off a wintery, party-perfect look – a lace-topped dress, wine-colored lips and tights – at the “Red is the New Black” campaign kick-off in Maasmechelen Village, Belgium.

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HALLE BERRY

At the Cloud Atlas premiere in Berlin, Germany, may be wearing an unembellished black Helmut Lang dress, but it’s anything but boring thanks to the asymmetrical hemline and high slit. That statement cuff, plus her silver danglers (both by Irit Design) and coordinating Jimmy Choo sandals, don’t hurt either.

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BRITNEY SPEARS

Wearing her new bangs in a fresh way, the X Factor judge slips into a ruched long-sleeve mini and strappy heels at a party in Beverly Hills for the show’s finalists.

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PENéLOPE CRUZ

The actress makes a solid case for wearing bright colors in the fall with a turquoise one-shoulder vintage Versace gown and Chopard jewels at the Venuto Al Mondo premiere in Rome, Italy.

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OLIVIA WILDE

Rules like “No white after Labor Day” were meant to be broken, according to Olivia, who selects a below-the-knee belted Calvin Klein Collection frock in the hue for the ACE Awards in New York City. She punctuates the ladylike number with black heels and a snakeskin clutch, both by Vince Camuto.

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DEMI LOVATO

Demi joins Britney at the X Factor party in her usual flirty-yet-edgy garb including a flouncy red mini and a studded leather jacket, which she appropriately accessorizes with a crimson pout and a sleek topknot.

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KHLOé KARDASHIAN ODOM

The slimmed-down shows off her svelte figure in a simple black Skaist Taylor sweater dress (is it reminding anyone else of Britney’s outfit?), BaubleBar earrings and black pumps for the X Factor bash.

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MARION COTILLARD

Promoting her new film, Rust and Bone, in Hollywood, the French actress opts for an interesting, high-low peek-a-boo Dior dress with sexy black sandals and Chopard gems.

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MISCHA BARTON

Hats, uh, off to , who certainly makes a noble attempt to work an elaborate topper along with her bold purple frock at the Melbourne Cup in Australia.

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JULIANNE MOORE

L’Oréal Paris’s newest face flaunts her flawless skin in an off-the-shoulder winter white Calvin Klein Collection dress and strappy black shoes, worn to the ACE Awards in N.Y.C.

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ROSE BYRNE

Also Down Under for the Melbourne Cup, Rose takes a subtler approach to race attire, choosing a sweet black, white and tan number accessorized with black heels and a nude clutch.

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JESSICA ALBA

It may be November, but is thinking spring, selecting a dreamy pink floral-print Valentino gown, Harry Winston jewelry, Jimmy Choo shoes and Roger Vivier clutch for the Baby2Baby gala in Culver City, Calif.

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KRISTEN STEWART

has nothing to hide in her skin-baring white top and tailored black slacks, worn to the Hollywood premiere of On the Road at the AFI Fest, presented by Audi.

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NICOLE RICHIE

takes a trip to the ’20s in her deco-inspired Lorena Sarbu gown, accessorized with a box clutch, Amrapali earrings, House of Harlow 1960 ring and finger waves at the Baby2Baby gala.

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AMY ADAMS

also hops on the fall floral trend, choosing a printed, full-skirted Dolce & Gabbana dress paired with Bulgari jewels and Roger Vivier sandals for the On the Road screening in Hollywood.

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PENéLOPE CRUZ

Has a trench coat ever looked this hot? At a Roman photocall for her new film, TwiceBorn, steps out in a black leather Versace number and matching Jimmy Choo platform pumps.

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ELIZABETH BANKS

Girlie-girl on top, tough chick on the bottom: Elizabeth mixes it up in a navy-and-gray graphic midi teamed with brown calf boots and a Stella & Dot necklace at The Breeders’ Cup World Championship in Arcadia, Calif.

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EVA MENDES

Hello, bombshell. The actress chooses a knee-length Dolce & Gabbana lace dress with a sexy low-cut neckline, matching Brian Atwood pumps and a Sergio Rossi clutch for a Holy Motors screening in Hollywood, Calif.

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JULIE BOWEN

The Modern Family star dazzles at the Baby2Baby Gala in Los Angeles in a violet sequined Naeem Khan V-neck gown, which she finishes off with a swept back ‘do and black Jimmy Choo clutch.

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MINDY KALING

Also at the Baby2Baby gala, the actress proves she’s just as stylish as she is funny in a chic cream MaxMara gown, metallic snakeskin Rebecca Minkoff clutch, drop earrings and a fun blue manicure.