Anna Wintour, Dwayne Wade & Sarah Jessica Parker
QVC's FNO fete brought together these icons of style, sports and showbiz. "I'm trading in LeBron (James) and Chris (Bosh) for Anna and Sarah," joked the Miami Heat star.
Lea Michele
Rachel Berry's alter ego ditched the argyle and cardis to attend Saks Fifth Avenue's FNO party in a hip and stylish shirtdress.
Leighton Meester
Rocking dark hair and distinct bangs, the Gossip Girl star merged her love of music and fashion as she performed for Tiffany & Co.'s festivities.
Vanessa Hudgens
The starlet turned mixmaster celebrated FNO by spinning tunes at Popchip's Playland party.
Rachel Zoe
The multihyphenate style superstar hit Bloomingdale's legendary 59th Street location to celebrate with hubby Rodger Berman (not pictured).
Giuliana & Bill Rancic
What happens in Vegas is fine to share if it's all in good fun. E!'s very own Giuliana and her hubby hosted FNO at the Shoppes at the Palazzo.
Kelly Osbourne
Our very own Fashion Police host headed to the Windy City to host Macy's State Street celebrations.
Adriana Lima
The Victoria's Secret Angel celebrated Fashion's Night Out in Soho decked out in a sexy Jay Godfrey dress.
Justin Bieber
The "Eenie Meenie" singer brought his pipes to the Dolce & Gabbana party in NYC with a performance to benefit Pencils of Promise.
Chace Crawford
Justin Bieber wasn't the only pretty face to grace Dolce & Gabbana's FNO party—this stylish (and studly!) Gossip Girl star also made an appearance.
LL Cool J
The NCIS: Los Angeles star kicked off Bloomingdale's fashion show at Westfield Century City and also found time to promote his new cologne, Gendarme.
Nicole Richie
The House of Harlow designer teamed up with L.A.'s Mayor Antonio Villaraigosa and Vogue's Lisa Love to cohost the Beverly Center's big shopping bash.
Tori Spelling
Li'l Liam and Stella (not pictured) were also on hand to support this expectant mama as she celebrated Fashion's Night Out at Westfield Topanga.
Laila Ali
Moms-to-be got in on the act at Destination Maternity's NYC store. Ali left her own little one at home to serve as host of the evening, which benefitted the March of Dimes.
Olivia Munn
The Perfect Couples star hit jeweler David Yurman's swanky soiree benefitting the New York City AIDS Fund.
Mary-Kate & Ashley Olsen
JCPenney's Miss for a Must event in NYC brought out the Olsenboye designers—their line is exclusive to the retailer.
Camilla Belle & Ryan Good
The actress attends David Yurman's party with Justin Bieber's stylist—not that she needs the help!
Nicky Hilton
The heiress turned designer celebrates the launch of her Nicholai by Nicky Hilton jewelry line at Big Drop for Fashion's Night Out.
Miley Cyrus
Chicago's Topshop opening lured the Hannah Montana star out for some celebratory spending.
MORE PHOTOS: Fashion Week Spring 2012: Runway Rundown