Best Celebrity Style For December 5, 2011

This week's favorite looks are culled from red carpets, store openings, and parties, making for one incredibly glamorous crew of celebrity favorites. Diane Kruger stepped out for UNICEF's Ball in a sultry, sheer Emilio Pucci gown, Jessica Biel hit the New Year's Eve premiere in a sparkly Valentino, and fashion darling Olivia Palermo dazzled in a little black Marchesa. There's more in store, like Kristen Bell in a wintry white Christian Dior gown and Nicole Richie channeling her signature edgy chic in a leather cutout Osman gown — step inside to see them all.