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

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PIPPA MIDDLETON

ready to party, promoting her event-planning book in London wearing a sheath with a flared skirt, chandelier earrings and those signature sensible pumps the Middletons are so fond of.

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GWEN STEFANI

Menswear really suits the , who steps out in a Calvin Klein Collection two-tone two-piece, a bandeau bra, Neil Lane jewels and, of course, crimson lips at an Audi-sponsored CFDA/Vogue Fashion Fund event in L.A.

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KATY PERRY

It’s no ballot box dress, but Wes Gordon swan-print sheath and Manolo Blahnik for Wes Gordon ankle-tie heels, plus Jennifer Meyer gems, still make a statement at the L.A. CFDA party.

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LEIGHTON MEESTER

With such a busy Mary Katrantzou mini stealing the spotlight, the wisely keeps her accessories minimal at a Flaunt magazine party in her honor in L.A.

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JULIANNE HOUGH

One way to sex up a floor-length, high-necked gown: Divide it in two to reveal a slice of toned tummy. does just that in Naven, along with Sydney Evan jewelry and Jerome C. Rousseau heels at a Samsung Galaxy Note II party in Beverly Hills.

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ASHLEY GREENE

Herman Verwey/City Press/Gallo Images/Getty

Twilight goes global, as the promotes the final film in Johannesburg, South Africa, showing off her new red strands with a lace-bodice dress.

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SARAH JESSICA PARKER

Showing her stripes in a L’Wren Scott dress, plus a matching jacket and bag and Fred Leighton jewelry, the is all smiles at the Fashion Group International dinner in N.Y.C.

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VICTORIA BECKHAM

At the CFDA/Vogue event in L.A., the strikes her favorite pose, though she shakes things up (a bit) by forgoing her favorite color – black – for a white-and-ivory ensemble.

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RACHEL BILSON

Looking fierce in a red leopard-print one-shoulder Preen dress and gray suede pumps, hits the red carpet for the L.A. premiere of Fun Size.

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VIOLA DAVIS

For the Fashion Group International dinner in N.Y.C., the actress opts for an elegant black-and-white Max Mara gown, dangling earrings and an embellished clutch (both by Swarovski).

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HALLE BERRY

Things we want: the body and the actress’s shimmering silver Dolce & Gabbana mini, which she wears with dangling Sutra sparklers to the Hollywood premiere of Cloud Atlas.

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SOFIA VERGARA

Another member of the Over 40 and Fabulous Club shows off her killer curves at the Domingo Zapata art event in N.Y.C. donning a sheer black mini, plus coordinating tights and heels and one pop of color via a red croc clutch.

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TAYLOR SWIFT

Stepping out in her signature shade, the pairs a red top with a vintage-feeling plaid skirt, Pearl Collective bracelets and bow-topped heels to meet fans at an N.Y.C. Walgreens event.

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JENNIFER HUDSON

On hand to help Donatella Versace launch her new N.Y.C. store, the picks a Versace look with maximum impact, from the tangerine cape to the studded boots.

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RACHEL ZOE

Black on black on black continues to be the style M.O. for Rachel, who finishes her draped velvet gown with a furry shrug, stacked platforms and a black bag – plus layers of pearl-and-coin chains – at the London Showrooms event in L.A.

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KRYSTEN RITTER

Somewhere, a girl is missing her prom dress from 1987. The Don’t Trust the B actress brings the look back, wearing an off-the-shoulder embellished Timo Weiland dress with BaubleBar earrings and Jimmy Choo pumps at a Coca-Cola Ekocycle party in N.Y.C.

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STACY KEIBLER

To kick off Rent the Runway’s “Our Runway” section, the model picks a girlie teal lace Nanette Lepore dress (available to rent on the site!) and barely-there sandals, plus a few knockout rings.

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JULIANNE HOUGH

The puts her own spin on menswear, adding a ruffled top and strappy sandals to her boyfriend-cut tux, worn to the Fulfillment Fund gala in Beverly Hills.

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KRISTEN STEWART

The Twilight: Breaking Dawn Part 2 kicks off the film’s promotional tour in Tokyo wearing a very bold and very short Louis Vuitton romper, plus sexy criss-cross Brian Atwood heels and an Iwona Ludyga Design bracelet.

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DUCHESS CATHERINE

The picks a dress that looks inspired by English gardens: a pansy-embroidered sheer Temperley London sheath, worn with black pumps to a London reception for Great Britain’s Olympic medalists.

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PENéLOPE CRUZ

Playing supportive wife to her Skyfall star husband Javier Bardem at the film’s London premiere, the almost steals his spotlight in a glittering L’Wren Scott gown and a matching golden clutch.

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SARAH JESSICA PARKER

Topping a long, velvet-and-lace scarf/gown hybrid (from the Maison Martin Margiela and H&M collaboration) with a menswear jacket, David Yurman rings and loose curls, the continues to up the style ante. She wears this look to the Maison Martin Margiela with H&M launch party in N.Y.C.

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BROOKE SHIELDS

Lovely in a lilac Angel Sanchez gown with touches of yellow (and a coordinating clutch), the actress attends the Alzheimer’s Association Rita Hayworth gala in N.Y.C.

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MENA SUVARI

Eyes up here. Also in N.Y.C. to fête the Maison Martin Margiela collection for H&M, the star wears her own bold look – a bra-top with an A-line skirt and a clutch so big it could double as a suitcase (all from the H&M designer collaboration).

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KRYSTEN RITTER

The Don’t Trust the B star celebrates her show’s return to TV, stopping by the Sirius XM studios in N.Y.C. in a Collette Dinnigan dress and bow-topped Jimmy Choo heels.

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BéRéNICE MARLOHE

The newest Bond girl proves why she’s perfect for the job in a bombshell Vivienne Westwood gown and dramatic Stephen Webster jewels at the London premiere of Skyfall.

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KATIE HOLMES

A $70 dress (from Narciso Rodriguez’s collection for Kohl’s, which hits stores Nov. 7) looks like a million bucks on the , who pairs her ruched black number with a gold-buckled clutch and nude heels.

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NICOLE RICHIE

From short and velvet to long and lacy, the shows her versatility, selecting a high-necked sleeveless gown, House of Harlow 1960 jewels and black patent accessories for the QVC FFANY event in N.Y.C.

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KIM KARDASHIAN

Also playing style chameleon, the trades in her signature skintight minis for a loosely draped sapphire gown (but still shows plenty of skin, obviously) at the Angel Ball in N.Y.C.

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JESSICA CHASTAIN

She’s starring in The Heiress on Broadway, so it’s no wonder that Jessica looks at ease in her Harry Winston jewels. She wears the bling with a black-and-white party dress and black heels to an N.Y.C. party hosted by the jeweler in the actress’s honor.

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TAYLOR SWIFT

Rocking red lips to celebrate the launch of her album Red in N.Y.C., the shows a more mature side in an elegant dark dress, a House of Lavande Vintage cocktail ring and sparkling Christian Louboutin heels.

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LAUREN CONRAD

The Starstruck sticks with her signature A-line party dress, but shakes things up a bit by wearing the Johanna Johnson frock in leather. Add a voluminous pony and Sydney Evan jewels and she’s got a winning look for an event celebrating her book in Santa Monica, Calif.

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EMMA ROBERTS

After seeing this colorblock dress from the Narciso Rodriguez for Kohl’s collection (worn with an Edie Parker clutch and black heels to the line’s N.Y.C. bash), we’re counting down the days until the launch and clearing out space in our closets.

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VIOLA DAVIS

Wearing her hair natural to the Chicago International Film Festival allows the star to highlight the halter neckline on her belted Trina Turk jumpsuit, which she accessorizes with a shimmering gold clutch.

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AMY ADAMS

Davis’s Doubt co-star attends the Hollywood Film Awards gala in Beverly Hills looking the best she has in months, thanks in part to her striking midnight blue Oscar de la Renta column, Tiffany & Co. gems and those enviable cascading auburn waves.

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AMANDA SEYFRIED

At the same Beverly Hills awards gala, the actress goes bold and bright in a corset-detail Prabal Gurung dress, high-shine Jimmy Choo heels, Dana Rebecca Designs earrings and a fierce red pout.

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NICOLE RICHIE

In a vaguely familiar black velvet mini, plus statement necklaces and minimal makeup, the gives teaching a try at Teen Vogue’s Fashion U in N.Y.C.

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JULIANNE HOUGH

dazzles in an embellished powder blue Jenny Packham gown, worn with rosy lips at the Carousel of Hope Ball in Beverly Hills.

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HEIDI KLUM

She’s no longer on the market, but the still looks down to party in a glitzy silver tube dress and matching Jimmy Choo sandals at the Children’s Hospital L.A. gala.

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ANNA FARIS

The new mama takes a night off, attending a Hollywood presentation of Reel Stories, Real Lives in a pale yellow shift and sparkling champagne heels.

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MANDY MOORE

Though she’s most often seen in girlie party dresses, the revs up her sex appeal in cropped cigarette pants, a leather jacket and a scarlet clutch that matches her bright red pout (plus Dana Rebecca Designs jewelry) for the opening of NARS’s new boutique in L.A.

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NAYA RIVERA

One part Barbie, one part businesswoman and with a dash of flight attendant, this hot pink Diane von Furstenberg suit (worn with green pumps by the Glee star to a cast performance at a Culver City, Calif., school) is 100% fun.

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KRISTIN CAVALLARI

Still not convinced the is back in pre-baby form? Well, she’s here to prove it once and for all in a silky white Olcay Gulsen top and raspberry high-waist shorts, which she selects for a Bing Halloween event in N.Y.C.

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HEIDI MONTAG

Meanwhile, Kristin’s Hills costar does her own take on formal shorts at a Crazy Horse III gentlemen’s club party in Las Vegas, pairing a sheer bodysuit with leather hot pants and strappy heels.