Kelly Clarkson And Demi Lovato Hug It Out

Singers Kelly Clarkson, left, and Demi Lovato perform together at Z100's Jingle Ball concert at Madison Square Garden on Friday, Dec. 9, 2011 in New York. (AP Photo/Evan Agostini) » 12/11/11 1:35pm 12/11/11 1:35pm

Wonder Nutcracker Woman

[New York, New York, December 10: Katy Perry synthesizes two different looks and hides behind her mustache at Z100's Jingle Ball 2010 at Madison Square Garden. Image via Getty.] » 12/11/10 11:50am 12/11/10 11:50am