[Katy Perry, Selena Gomez] [Allison Williams, Prabal Gurung] [Uma Thurman via, via BFA]
Last night in NYC, Selena Gomez, Katy Perry, and Allison Williams supported UNICEF at the annual Snowflake Ball, Monique Lhuillier celebrated her store opening, Stuart Weitzman was honored at the 2012 Footwear News Achievement Awards, Alicia Keys stepped out with Swizz Beatz for her album release party, and more!