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

KATY PERRY

The singer almost makes us forget about her cutesy costumes with this classic salmon-pink sheath with ruffled details, which she wears with a jeweled belt and heels (all by Oscar de la Renta), along with Sally Sohn earrings and an Effy ring, to accept Billboard's "Woman of the Year" award in N.Y.C.

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

KIM KARDASHIAN

She's really committing to this style makeover, and for that give the woman props. That said, we're not exactly on board with her futuristic cut-out gold-and-white number, worn to open a Millions of Milkshakes franchise in Kuwait.

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

LEA MICHELE

The Glee star bares her slim stems in a high-slit, low-cut cream gown, worn with Irene Neuwirth earrings and a beaded clutch to a Golden Globes party in West Hollywood.

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

KATIE HOLMES

She got good reviews for her role in Broadway's Dead Accounts. Will she get similar raves for this floral dress with crochet inserts, worn with Gio Diev pumps and a yellow clutch to the play's N.Y.C. premiere party?

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

PIPPA MIDDLETON

Continuing a Middleton tradition of wearing cute coats, Pippa tops her black mini with a fuzzy midnight-blue Sandro jacket and finishes the look with a print clutch and booties at a St. James Christmas Carol service in London.

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

DIANE KRUGER

Someone took our recommendation about which trends to try! The actress flashes a strip of skin in her two-piece Rochas number, then adds bow-adorned booties, a Lena Erziak clutch and delicate bracelets at the West Hollywood Golden Globes bash.

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

OLIVIA WILDE

Add this to our list of potential holiday party outfits. For the Hollywood premiere of her film Deadfall, the actress sparkles in a demure L'Wren Scott skirt-and-sweater ensemble, plus jewels by Ariel Gordon, Iwona Ludyga Design, House of Lavande Vintage and Pearl Paradise.

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

JENNA DEWAN-TATUM

It takes a brave (and bronzed) girl to wear a coral toga in November, but the actress pulls it off with aplomb (and lots of Melinda Maria jewelry) at the West Hollywood Golden Globes party.

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

NIKKI REED

Twilight's star steps out at the Autism Speaks ball in Beverly Hills wearing a short-sleeved, full-skirted party dress by Ted Baker and strappy sandals.

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

KATE MARA

Also at the Hollywood Deadfall premiere, the actress goes for the bold in a chartreuse wrap dress with a blace lace insert and T-strap Brian Atwood heels.

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

BRITTANY SNOW

It's not that her ruched and draped black Amanda Wakeley gown, Adeler ring and studded heels aren't worth mentioning. It's just that her slicked-back short crop is so much more noteworthy. She wears the '80s-throwback style to the Golden Globes party in West Hollywood.

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

TAYLOR SWIFT

There's a reason Taylor turns to Elie Saab for so many of her red carpet gowns: The designer never lets her down. She dons his cream chiffon gown with minimal jewels and Jimmy Choo heels to the ARIA Awards in Sydney.

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

KRISTEN STEWART

After a whirlwind few weeks of red carpet glamour, the actress is back to her preferred casual duds, wearing a somewhat sheer A.L.C. top, plaid Juicy Couture pants and her two favorite bracelets to a Variety Studio event in L.A.

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

KELLY OSBOURNE

No word on whether Kelly consulted her Fashion Police co-host Joan Rivers on this particular look: a mixed-print puff-sleeve sheath and sparkling Aldo pumps, worn to the W LOVE Hangover Ball in N.Y.C.

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

VICTORIA BECKHAM

The pose is the same, the hair is the same – but that smile is new! Posh breaks tradition for the Valentino: Master of Couture exhibit in London, to which she wears a scarlet skirt suit accessorized with black peep-toe booties and yes, a grin.

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

ZOË SALDANA

She might just be as psyched for the Target + Neiman Marcus holiday collaboration as we are! The actress fêtes the wallet-friendly finds in N.Y.C. in a floral-print Lela Rose for Target + Neiman Marcus top with black pants, a L'Agence blazer and Brian Atwood heels, plus a majorly smoky eye.

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

FERGIE

Fergie goes deep into her collection of shiny shirts to pull out this gold-buttoned number, which she pairs with leather pants and bronze Brian Atwood platform heels to the W LOVE Hangover party in N.Y.C.

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

KATE BOSWORTH

Also checking out the goods at the Target + Neiman Marcus event, the actress braves the N.Y.C. chill in a sheer bodice Emilio Pucci cocktail dress, Alexandra Mor earrings and a Prabal Gurung for Target + Neiman Marcus clutch.

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

LEIGHTON MEESTER

We hardly recognize her with her short new do! The actress complements her chin-grazing crop with a dress that's equally daring (thanks to the bare back), plus Brian Atwood heels and Paige Novick gems, at the Target + Neiman Marcus party in N.Y.C.

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

OLIVIA PALERMO

Longtime Valentino fan Olivia picks a majorly busy dress (white lace, black lace, zig-zags, sheerness) then gussies it up further with a glittering necklace and multicolor pumps, to celebrate the designer's Master of Couture exhibit in London.

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

KERRY WASHINGTON

Is there anyone more consistent than Kerry? At the Variety Studio event in L.A., she looks predictably lovely in a black-and-white polka-dot Kate Spade New York dress, plus a dove-gray Nancy Gonzalez clutch and a sideswept do.

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

MOLLY SIMS

We've got to hand it to a star for knowing what she likes and sticking to it! The actress selects a BCBG Max Azria maxi, BCBGeneration black blazer and booties for a Rembrandt and Neutrogena event in N.Y.C.

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

DUCHESS CATHERINE

Looking like one of (Prince) Charlie's Angels, the Duchess of Cambridge complements her retro new bangs with a pleated dress that's equally '70s-inspired at the opening of London's Natural History Museum's Treasures Gallery.

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

ANNE HATHAWAY

Much like the plot of Les Mis, the Antonio Berardi dress Anne wears to an event for the film in Tokyo has quite a lot going on, including a keyhole cutout, sheer skirt, high-low hemline and elaborate back design.

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

SELENA GOMEZ

Her relationship status may be in question, but one thing is certain: The star is turning heads in her backless Dolce & Gabbana dress and Lorraine Schwartz jewelry at the UNICEF ball in N.Y.C.

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

FERGIE

The shoe-designing singer is well-heeled at the Footwear News achievement awards in N.Y.C., stepping out in an emerald peep-toe pair to go with her draped-and-sheer teal mini.

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

KATY PERRY

Confession: Editors here are currently online shopping for capes after seeing Katy at the N.Y.C. UNICEF event in a caped Naeem Khan creation, worn with Lorraine Schwartz sapphire jewelry.

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

ZOË SALDANA

In her pretty fit-and-flare Preen frock, worn with shimmering Rupert Sanderson leopard pumps, Jamie Wolf jewelry and red lips, the actress looks ready to hit up a holiday party…or, you know, the Independent Spirit Awards nominations in Hollywood.

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

CATE BLANCHETT

This tricolor Antonio Berardi (worn with Roger Vivier sandals) may be difficult for mere mortals to pull off, but the fashion-forward Hobbit star makes it look easy at the film's Wellington, New Zealand, premiere.

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

SALMA HAYEK

Salma's having a swingin' good time at the British Fashion Awards in London, wearing a fringed black Stella McCartney number with matching pumps.

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

SOLANGE

First: Influence Beyoncé. Next: the world. The singer shows off her unique style in a printed Boxing Kitten romper and buckled heels at Sonos Studio in L.A. at the listening party for her new album, True.

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

ALLISON WILLIAMS

Also bringing the sparkle to the UNICEF event in N.Y.C., the Girls star does her best Snow Queen in a glittering aqua Naeem Khan gown and Bulgari gems.

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

RITA ORA

Jay-Z's protégé is a total knockout in a silver-and-aquamarine Vivienne Westwood gown, sparkling choker and Old Hollywood waves, all worn to the British Fashion Awards in London.

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

AMY ADAMS

Representing at the IFP Gotham Independent Film Awards in New York City, Amy strikes a pose in a sleek asymmetrical black Giorgio Armani peplum dress, Lorraine Schwartz gems and ankle-strap Brian Atwood heels.

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

EMILY BLUNT

Also at the Gotham Awards, sponsored by Euphoria Calvin Klein, Emily rides the cutout wave in a strapless white Calvin Klein Collection dress, chunky Lorraine Schwartz necklace and flashy silver Jimmy Choo sandals.

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

PIPPA MIDDLETON

Out in London to celebrate England's W&W Jewellery, the author opts for a shiny high-waisted skirt, sheer ivory top, tan heels and statement jewels.

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

ALICIA KEYS

Continuing her Girl on Fire album tour at SiriusXM in New York City, Alicia keeps it casual in an army-green blouse, gray sweater, A.L.C. leather jacket, black slacks and booties.

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

MARION COTILLARD

The French actress choses a chic navy tea length Dior Haute Couture design paired with Chopard jewels and black pumps at the Gotham Independent Film Awards in N.Y.C.

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

ROSE BYRNE

At the Killing Them Softly screening in N.Y.C., Rose buttons up in a sheer floral blouse, a flouncy black mini skirt and red lip.

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

ALLISON WILLIAMS

We didn't compare her to the Duchess of Cambridge for nothing: The Girls star is lovely in a sheer nude gown with pink-and-black lace applique finished with soft waves and sparkly danglers at the Gotham Awards.

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

KATHARINE MCPHEE

Also checking out the Killing Them Softly screening, Katharine adds two pops of color to her dark Bleulab skinnies and black leather jacket with a silky turquoise button up and bold red lip.

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

DIANE KRUGER

The City of Light shines a little brighter thanks to the actress. She helps illuminate the Christmas decorations on Paris's Champs-Élysées wearing a belted olive Lanvin look, black Brian Atwood booties and an intricately braided hairstyle.

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

JENNIFER LOPEZ

La Lopez offsets a simple white Roberto Cavalli blouse and slacks with dramatic makeup and dramatically long hair for an event in Dubai.

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

NICOLE KIDMAN

Just one Aussie paying homage to other Aussies: The actress from Down Under attends an L.A. event for Australians in an understated black sheath with bright red pumps and a pretty half-up do.

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

SALMA HAYEK

Salma goes with a black-and-gold theme, from her criss-crossed caftan to her bold bangles, at the Bambi awards in Düsseldorf, Germany.

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

MISCHA BARTON

In London to launch "the most expensive iPhone accessory in the world," the actress opts for a look we'd deem "the most forgiving post-Thanksgiving ensemble in the world": a loose, sweeping gown with an embellished bodice and contrasting hem.

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

OLIVIA PALERMO

Olivia attends the Marie Claire Prix de la Moda awards in Madrid, wearing a prize-worthy slim black column gown with fringe details at the collar and cuffs, plus a deep ruby clutch.

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