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Allison Williams

2012 UNICEF Snowflake Ball at Cipriani 42nd Street. Pictured: Allison Williams Ref: SPL464108 271112 Picture by: VS / Splash News Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 870-934-2666 photodesk@splashnews.com

2 Hot 2 Handle

This week's best-dressed crew includes Celine Dion, Cate Blanchett, and Jessica Biel. -- By Matt Whitfield, Yahoo! Staff