Photos of Barneys New York Book Party For Derek Blasberg's Classy

Fashion writer Derek Blasberg is doling out some advice for ladies via his new book, Classy. To celebrate, the author and his fabulous friends, like Byrdie Bell, Katie Lee, and Chloe Sevigny, gathered at Barneys New York last night, where Derek signed books and got goofy — but stayed classy — with this fashion pack. Click on for a peek at all the fun.