Christina Aguilera turns 32 today! The wife, mother, and singer initially riffed her way into our hearts in '90s, when she escaped from her bottle and asked us to come on over—and now (but not for much longer!) she has a weekly place in our lives as a coach on NBC's The Voice. Whether you prefer old-school Christina or want to rock out to Lotus, celebrate her big day by clicking through her beauty transformation—wild 'dos included! See her hair-volution in the gallery.