Christina Aguilera Best Beauty Looks in Honor of Her Birthday

We love how this rare detour into black hair at the 2003 MTV Europe Music Awards puts all the focus on Xtina's big blue eyes. It's a look we're hoping she brings back, just, you know, maybe without the tan.

Retro curls, paired with super-skinny brows at the 2004 Shark Tale premiere. Short hair really suits her petite face, don't you think?

Back to blond, this time with vintage-inspired mini-bangs at Variety's Power of Women luncheon in 2009. Good move, as a fringe gives this classic half-up style a little edge.