Last Night's Look: Hit or Miss?

Vote on this week's styles including Ashlee Simpson-Wentz, Jessica Alba and more stars! You decide – are they fashionistas or flops?

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REESE WITHERSPOON

Only her voice may star in Monsters vs. Aliens, but all eyes are on Witherspoon at the film's L.A. premiere in her green and silver Rodarte and two-tone Balenciaga pumps.