What's Her Best Look?

Changing hair colors, makeup and cuts is all in a day's work for a celeb. Vote on which style works best for Julianne Moore, Kelly Osbourne and more. By Melissa Liebling-Goldberg

Credit: Marion Curtis/Startraks; MJ Kim/Getty

Updated: Wednesday Jul 25, 2007 | 06:00 AM EDT

SIENNA MILLER

After spending the last year as a platinum blonde, the actress dyed her hair dark caramel for her latest role in The Edge of Love.