By Bronwyn Barnes
Nov 02, 2011 @ 4:35 pm
Cindy Ord/Getty Images

Blake Lively (in Dolce & Gabbana) showed her allegiance to Christian Louboutin during a bash for Les 20 Ans, a book of images marking the shoe guru's 20th anniversary in the footwear business, held at Barneys in New York City.  Click through to see Mary-Kate and Ashley Olsen, Anne Hathaway and more stars at last night's hottest parties.