Xtina's way better.
Kelly can't go passed 5 octaves, and isn't as powerful vocally as X.
100 Greatest Singers Of All Time -
Christina Aguilera who has influenced Danity Kane,
Kelly Clarkson -
http://www.rollingstone.com/music/li...ilera-19691231 Kelly wouldn't even be here without C/X, and her help making her with Miss Independent.
With 1 performance she's memorialized in the Rock, & Roll Hall Of Fame -
Kelly could never!!!