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

HILARY DUFF

The new mom gets all dressed up for the March of Dimes Celebration of Babies luncheon in Hollywood, wearing a shift featuring stripes in peach, cream and charcoal, plus high-shine silver shoes and a coordinating chunky cuff.

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

FERGIE

'Tis the season for red sequins, of which Fergie is clearly aware. She wears a high-shine scarlet Monique Lhuillier mini with pewter pumps to a Voli vodka party in West Hollywood.

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

REESE WITHERSPOON

Just two months after giving birth to her son, the star is back in prime red carpet form, wearing a lacy Elie Saab sheath and pointed pumps at the Children's Defense Fund awards in Beverly Hills.

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

KRISTEN STEWART

The actress hits all the items on the K-Stew Red Carpet Checklist: something black, something lacy, shorts, Barbara Bui booties, messy hair and her two favorite bracelets (by Cartier and Iwona Ludyga Design) for a private screening of On the Road in L.A.

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

BRITNEY SPEARS

Brit goes bold in an embroidered leather minidress with a lace back and violet platform sandals, which she selects for an L.A. viewing party of her show The X Factor.

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

ZOË SALDANA

Joining Reese at the Children's Defense Fund event in Beverly Hills, the star has us thinking that sophisticated is her middle name thanks to a belted Giambattista Valli dress and T-strap peep-toes.

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

ALICIA KEYS

The singer trades her tomboy favorites for a totally glam, girlie-girl look at an N.Y.C. gala for her charity, Keep a Child Alive. She wears a fitted burgundy gown with a shimmery choker and a sleek black clutch.

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

AMANDA SEYFRIED

Though this picture doesn't show her best accessory (Les Misérables co-star Eddie Redmayne), the star still looks good at London's Sun Military Awards in an elegant petal-print Alexander McQueen gown and silver bow belt by the line, plus shining Rupert Sanderson sandals.

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

JENNIFER HUDSON

Styling red leather shorts is not an easy task, but Jennifer gives it her best shot, wearing them with tights, booties, a camel sweater and an oversize black cardigan to the Lucky shops event in N.Y.C.

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

ALLISON WILLIAMS

The Girls actress apparently also received the red sequin memo, because she chooses a super-sparkly zig-zag L'Wren Scott number for the L'Oreal Women of Worth awards in N.Y.C.

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

EMMY ROSSUM

Yet another holiday party dress we wouldn't mind borrowing from a star! The actress is flirty and festive in a lacy, shimmering red Zuhair Murad mini, nude Jerome C. Rousseau heels, House of Lavande Vintage earrings and a half-up do at the Microsoft All-Access Holiday Party in Venice, Calif.

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

ANNE HATHAWAY

Though we won't be adding this to to her best white gowns list, we're intrigued. The star wears a pearl-beaded, draped white gown with a dramatic neckline and a plunging ruffled back (by Givenchy Haute Couture by Riccardo Tisci) to the London premiere of Les Misérables.

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

GWYNETH PALTROW

If you ever doubt that a pants suit can be as sexy as an LBD, just refer to this photo of Gwyneth. She kills it in a pair of cropped cigarette pants and a detailed bustier with red Rupert Sanderson sandals at the opening of a Boss Nuit store in Dubai.

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

JESSICA BIEL

Jessica says that picking out a pink wedding dress was a leap of faith. No word on whether she felt the same way about this daring slashed one-sleeve Atelier Versace gown, worn with Sergio Rossi sandals to the N.Y.C. premiere of Playing for Keeps.

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

EMMA STONE

Half of 2012's best-dressed couple steps out in yet another dress we'd love to steal (this one by Daniel Vosovic) with neutral Rupert Sanderson heels at a Revlon launch (she's a spokeswoman) in N.Y.C.

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

AMANDA SEYFRIED

Another Les Mis star takes a fashion risk at the London premiere with a black-and-white, flamenco-inspired Balenciaga by Nicolas Ghesquière creation.

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

TAYLOR SWIFT

If it's girlie, cream-colored and A-line, you can be sure Taylor will wear it at some point. She stays true to her style in a lacy Maria Lucia Hohan dress and gold Jimmy Choo heels at the Grammy nominations concert in Nashville (where she picked up a few nods herself).

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

DEMI MOORE

Demi may be dating a 26-year-old, but her teeny romper at Chanel's Miami Beach benefit dinner feels even younger. As in, the sort of thing a preschooler might wear.

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

JESSICA ALBA

The actress is pure class and fabulousness at the Salvatore Ferragamo flagship store launch in London thanks to a flowing black gown and baguette-shaped clutch (all by Ferragamo).

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

ISLA FISHER

We personally are not that into white cutout dresses in December. Isla, however, plays by her own rules, picking glittery-heeled sandals to accompany her summery dress, worn to support husband Sacha Baron Cohen at the London premiere of his film Les Misérables.

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

JENNIFER HUDSON

Big curls + a body-con dress + gold-platform heels = J. Hud's party outfit, which she displays at a Chicago party for her cover of Michigan Avenue magazine.

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

JESSICA CHASTAIN

She plays one serious badass in Zero Dark Thirty, but at the film's N.Y.C. photo call, she's all lady in her rose-print Preen dress and nude heels.

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

KATY PERRY

Angelina's left leg-acy lives on in Katy, who strikes the infamous pose in her embellished emerald gown, bronze heels and dramatic Amrapali statement necklace at a Hollywood benefit for the Painted Turtle Camp.

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

ZOË SALDANA

Well, now we know what we're wearing to work tomorrow. The actress looks perfectly professional in a striped wrap skirt, printed tee and cardigan at a Marie Claire dinner in West Hollywood.

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

SARAH JESSICA PARKER

At an N.Y.C. screening of Vogue: The Editor's Eye, Glee's Vogue editrix proves she's worthy of the role, boldly mixing an autumnal rose-print vintage dress from Alexandra New York with a velvet Fendi shoulder bag and fluorescent Jean-Michel Cazabat python pumps.

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

KRISTIN CAVALLARI

To toast her Chinese Laundry capsule collection in N.Y.C., the former Hills star hits the town in a fit-and-flare red-and-black party dress along with heels of her own design.

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

DIANNA AGRON

Also at the N.Y.C. screening of Vogue: The Editor's Eye, the Glee star gets gussied up in a fringed, beaded floral shift, chunky heels and some flirty new bangs.

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

RUMER WILLIS

Demi's daughter proves that killer bods run in the family, showing off hers in a curve-skimming pale gown at the Mon Cheri Barbara Tag party in Munich, Germany.

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

ELLE MACPHERSON

At the same Munich bash, The Body does what she does best. In other words, she makes us all envious and stuns in a shocking yellow strapless Romona Keveza gown, ivory clutch and long, loose waves.

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

CHRISTINA RICCI

The actress pairs a chic LBD featuring a geometric print and a paper-bag waistline with satin sandals, a slim clutch and super-sleek locks at the Vogue film screening in N.Y.C.

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

BRITTANY SNOW

Pitch Perfect's star gives schoolgirl chic her best shot, combining a prim collared top, a polka-dot sweater, an oversize clutch and cap-toe heels for the W Hotels-sponsored Westwood, Calif., afterparty for Four Stories.

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

ROSE BYRNE

The actress helps reopen N.Y.C.'s Times Square Sephora in an elegant Monique Lhuillier cocktail dress with leather detailing, plus red-edged Gio Diev heels, flawless makeup and a cute curly do.

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

CARRIE UNDERWOOD

Though we're used to seeing the country star in sparkly ballgowns, we're digging this change of pace. She selects a sleek Katharine Kidd peplum jumpsuit with cap-toe heels, a Jill Milan clutch and Vahan jewels to the CMT Artists of the Year awards in Franklin, Tenn.

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

TAYLOR SWIFT

Meanwhile, at N.Y.C.'s Ripple of Hope gala, Taylor carries the torch for country stars in sparkles, wearing a gold tulle embroidered Oscar de la Renta confection with Jimmy Choo heels, Lorraine Schwartz earrings and an Ofira bracelet.

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

KATIE HOLMES

For the normally conservatively dressed actress, this is downright funky. She turns heads in a flutter-sleeve black dress with two-tone Gio Diev pumps to a Quentin Tarantino tribute at N.Y.C.'s MoMA.

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

KATE HUDSON

Almay's spokeswoman launches the new line in (comfy) style in N.Y.C., wearing a matching shirt and trouser ensemble from 3.1 Philip Lim with tan suede Casadei pumps.

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

DIANE KRUGER

One of Quentin Tarantino's muses pays tribute to the director at the N.Y.C. MoMA event, wearing a sheer tiered Prabal Gurung gown with an ivory Charlotte Olympia clutch, Crow's Nest jewelry and Brian Atwood heels.

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

MIRANDA LAMBERT

If the saying is true that "the higher the hair, the closer to God," then Miranda is practically heavenly thanks to her giant bouffant, which she wears with a shimmering Jovani champagne mini and gold platforms to the CMT event in Franklin, Tenn.

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

ALICIA KEYS

Alicia eschews typical festive attire at L.A.'s Jingle Ball, opting instead for a patchwork-print top, zip-up booties and a bold blue leather jacket.

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

HAYDEN PANETTIERE

She may play spicy on Nashville, but she's is all sugar in her draped magenta gown and bold blue Sutra jewelry at the CMT awards event in Franklin, Tenn.

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

JORDIN SPARKS

At L.A.'s Jingle Ball, Jordin shows off her sleek physique in a super-fitted scarlet body-con Nicole Miller mini and black lacy heels.

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

CONNIE BRITTON

Hayden's Nashville rival heads north to N.Y.C. for the African Children's Choir fundraising gala, wearing an abstract-print, puff-sleeve sheath with pointed Jimmy Choo pumps and her famously fabulous hair.

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

KRISTEN STEWART

In a sophisticated Talbot Runhof gown with a black-and-white lace bodice, black pumps and her favorite Cartier and Iwona Ludyga Design bracelets, the actress strikes a pose (and even cracks a smile!) at the Governors Awards in Hollywood.

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

ANNE HATHAWAY

Trading in her Les Misérables rags for something a little chicer, the star fêtes the film at an N.Y.C. screening wearing an ultramarine gown with a metallic belt, Jill Milan clutch, Graziela ring and matching bangles.

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

TAYLOR SWIFT

New dude, same old style. Taylor wears a striped Kate Spade New York A-line dress with simple pumps, understated Pearl Paradise earrings, a House of Lavande Vintage cocktail ring and red lips (of course!) to the KISS FM Jingle Ball in L.A.

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

RIHANNA

We may be officially over granny panties on the red carpet, but Rihanna doesn't seem to be on the same page. She wears the style via a lace-skirted romper with a golden choker and black pumps to her fragrance launch in Century City, Calif.

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

KATY PERRY

To be recognized for her work empowering LGBT youth at the Trevor Project's Hollywood awards ceremony, the star sparkles in an embellished blush Marchesa gown, a crown of braids and a quirky Lena Erziak apple-shaped clutch.

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

AMY ADAMS

Also at the Governors' Awards in Hollywood, the actress plays up her sideswept red curls in a beaded golden Jenny Packham gown, to which she adds Stephen Webster earrings.

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

ZOË SALDANA

Rose pink seems to be the color of the evening at the Trevor Project event in Hollywood. The actress picks a short, structured dress in the same hue Katy's wearing, adding a polished wood clutch and embellished heels (all by Lanvin); she finishes the look with jewels by Melinda Maria and Dana Rebecca Designs.

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

KERRY WASHINGTON

The Scandal star is usually demure at red carpet events, but at L.A. Confidential's anniversary bash in Hollywood, she revs things up, wearing a swingy snake-print mini with oversize buckle sandals and loose locks.

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

AMANDA SEYFRIED

Anne's Les Mis costar opts for short and sweet, wearing a lavender Marios Schwab dress with lattice details and light pink Rupert Sanderson pumps at the the N.Y.C. screening.

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

VIOLA DAVIS

Everything's coming up rosy for the actress, who wears a nude Alberta Ferretti sheath with rose gold streaks and matching heels, plus Atelier Swarovski by Nicholas Kirkwood rose gold hoops, at the CNN Heroes: An All Star Tribute event in L.A.

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

TINA FEY

Her TV alter ego Liz Lemon wore a Princess Leia dress to get married last week, but Tina opts for something a bit more elegant at Washington D.C.'s Kennedy Center honors: a gold lace faux-wrap Naeem Khan gown, a beaded clutch and a classic updo (no Leia double-buns here).

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