Bar Refaeli
Credit: Tim Whitby/Getty Images

Bar Refaeli is no stranger to over-the-top runway hairstyles, but there's one look she hasn't tried yet. "I would like to go ballsy one time and shave my head, but only if someone would promise me that I could take a pill and grow my hair back in one day," the model told at Elton John's Academy Awards viewing party last week. "But then I can't do fashion dares like that if no one promises me that I can go back to normal." Anything is possible!

See this year's hottest hair makeovers.

— Andrea Simpson