Christina Aguilera

With her dynamic four-octave vocal range and genre-bending instincts, Christina Aguilera has garnered critical acclaim and chart-success, balancing uplifting ballads with sexually liberated anthems all delivered with her iconic voice. A leader in the parade of Mickey Mouse Club veterans who stormed pop music at the turn of the millennium, Aguilera was the brassy diva of the bunch -- the Rolling Stones to Britney Spears' Beatles, as it were. Initially, it was difficult to see Aguilera outside of the prism of Spears, whose 1999 success launched the new millennium's teen pop boom...