April 29, 2011 - Larry Busacca/Getty Images North America more pics like this »
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Michelle Trachtenberg & Mila Kunis

Gossip Girl's Michelle Trachtenberg wore one of the evening's more dramatic ensembles, striking a vampish pose in a Notte by Marchesa gown and sparkling strappy sandals. However, she may have been out-sizzled by Mila Kunis, whose Versace gown featured a thigh-high slit up the front.