Kellan Lutz
Mr. Twilight isn't messing around, sporting a seriously stylish three-piece suit at the Tommy Hilfiger men's show.
Hayden Panettiere & Michelle Trachtenberg
Will work for shoes. The starlets show their love for Stuart Weitzman and a good cause with the launch of his Young Hollywood Cares collection for ovarian cancer research.
Jennifer Love Hewitt
Just call her the Glamour Whisperer as the front-row fashionista takes in the Project Runway show.
Heidi Klum
The Project Runway host doesn't seem to have forgotten any of her catwalk moves, strutting the season-nine runway show like a pro.
Jamie-Lynn Sigler & Ashley Tisdale
Famous front-row faces at Luca Luca's Spring 2012 show include these two stylish starlets.
Sarah Jessica Parker
The erstwhile Carrie Bradshaw made the rounds of FNO parties in Prabal Gurung before begging off to help get son James Wilke get ready for his first day at school. Priorities, people!
Justin Bieber
Goofy glasses and purple leather don't exactly scream high-concept couture, but the Biebs was Dolce & Gabbana's guest of honor Thursday night, performing and signing autographs to benefit Pencils of Promise—very stylish, indeed!
Miley Cyrus
Fifth Avenue isn't the only thoroughfare benefitting from Fashion's Night Out. It's a global shopping bash! Just ask the starlet as she attends the Topshop opening party in Chi-town.
Rachel Zoe
We don't know how she does it: The stylist, reality superstar, devoted mom and newly minted designer took time out of her busy schedule to attend the Supima show and judge their design competition.
Mary-Kate & Ashley Olsen
While li'l sis Elizabeth checked out the action at the Missoni for Target launch, the twins brought their star power to JCPenney's Fashion's Night Out party.
Vanessa Hudgens
Holy flashback! 'Nessa hits Lincoln Center's tents dressed in the very same sweater dress she wore last week. We're all for recessionista-style recycling, but this look doesn't seem worth the extra exposure.
Sophia Bush
From braving Hurricane Irene to the mad scene at New York City's Fashion Week, the One Tree Hill star takes it all in stride as she heads to the BCBG Max Azria show.
Camilla Belle & Margherita Missoni
The actress dons a signature-looking Missoni striped dress for a party celebrating the fashion house's collab with Target.
Alexander Skarsgard
Technically, BlackBook magazine's 15th anniversary party in NYC last night was pre-pre-Fashion Week, but any excuse to ogle the True Blood star on the red carpet is a good one!
LuAnn de Lesseps
That didn't take long. Fashion Week's first Real Housewives sighting comes courtesy of the Countess, who posed with the nearly naked models at the 2(x)ist show Wednesday night.
MORE PHOTOS: Fashion Week Spring 2012: Twitpics!