By Sharon Clott Kanter
Updated Dec 20, 2011 @ 11:35 am
Emmy Rossum
Credit: Eric Charbonneau/WireImage

For some extra tips on picking the perfect holiday outfit, we turned those who know best—celebrities, stylists, and designers. Find out what Emmy Rossum, Emma Roberts, Rebecca Taylor, and more have to say about their favorite party-ready looks in the gallery now.