15 Blondes Gone Brunette on the Big Screen

Everyone knows blondes have more fun. Right? Has anyone ever really researched this, or did someone (a blonde, we're betting) just make that up and say it enough times that eventually people accepted it as truth?

Well, wonder no more, because we've done some (very scientific) research -- and things are looking up for ladies with tresses from chestnut to chocolate and everything in between. So as Katherine Heigl prepares to hit the big screen as a brunette in "One for the Money," we at NextMovie have compiled our own list of Hollywood golden girls who have dabbled on the dark(er) side.