Stacey Keibler, Hayden Panettiere, Daren Kagasoff & More Kick Off Hollywood Week [PHOTOS]

Daren In His Undies
Daren Kagasoff drops his pants for VMan.
A bevy of beauties and a few hotties attended the Vanity Fair and Juicy Couture Vanities 20th Anniversary hosted by Vanity Fair West Coast Editor Krista Smith and actress Shailene Woodley in support of All It Takes at Siren Studios yesterday (February 20) in Hollywood, California.

George Clooney’s girlfriend Stacy Keibler attended the event solo wearing a fitted black suit with a high-necked crisp white shirt and silver heels.

The Vanities event was held to support George’s Descendants co-star Shailene’s charity All It Takes, charity which the actress launched in September 2010. Shailene’s The Secret Life of the American Teenager co-star Daren Kagasoff landed his support by attending the event.

Hayden Panettiere was covered up from in a bizarre bright red dress which she teamed with a bold canary yellow handbag. While Jessica Chastain went for a plunging number which she teamed with red lips and wore her hair pulled back into a pony tail.

Launch the gallery to check out all of the fabulous fashions.