Last night in NYC, Dakota Fanning and Leelee Sobieski got dolled up for the 2012 Tribeca Film Festival Vanity Fair Party, Kevin Bacon and Jon Hamm hung out at the Food Bank For New York City's 2012 Can-Do Awards, Nate Lowman and Spencer Sweeney stopped by the Public Art Fund Spring Benefit, Serefina opened in Meatpacking, and so much more. Last night's parties were all about Leelee Sobieski's Jil Sander dress! (No? Well, it should be.)

[Photos: Dakota Fanning, Drena De Niro, Rachel Roy, Leelee Sobieski]