Christina Aguilera

Birthday: December 18, 1980
Hometown: Staten Island, New York

Where You've Seen Her: The hottest MILF in pop registered at No. 14 on our 2009 Hot 100; and has won five Grammys, while selling more than 37 million records worldwide. Her upcoming album, Bionic, hits stores in June, making us believe that she truly isn't real, but just a perfect robot to toy with us men.

Christina Aguilera