Michelle Trachtenberg was in a lavender chiffon gown at School Of American Ballet Winter Ball 2011 in New York City . The ‘Gossip Girl’ actress looked divine wearing this lavender dress with a plunging neckline and embroidered detailing around the bodice. The color looked divine against her skin. I love that she appears to have taken things to another level. Shop Michelle Trachtenberg lavender dress at School Of American Ballet Winter Ball 2011 for 179.99, find Michelle Trachtenberg dresses and Gossip Girl Dresses for sale.