Ashley Greene's Giambattista Valli Twisted Crepe Gown

Who: Ashley Greene wearing a Giambattista Valli twisted crepe gown
Shop: Net-A-Porter US $2,395
Net-A-Porter International £1,500 / €1,800
Shopbop.com $2,395 / £1,575.71
Where: amfAR New York Gala To Kick Off Fall 2013 Fashion Week

Credit: Getty