Xtina: You've Come A Long Way Baby

5/3/2010 4:10 AM PDT

Xtina: You've Come A Long Way Baby

Christina Aguilera has really evolved as an artist.



Here's the 18-year-old former Mouseketeer back in 1999 (left) -- and 11 years later, the 29-year-old mother of one in her new music video (right).

Not myself tonight ... clearly.