The 2010 Jingle Ball
Katy Perry, Hayley Williams, B.o.B. and more


Tim Mosenfelder/Getty
Katy Perry performs at the 2010 Jingle Ball in Los Angeles, December 5, 2010.
Katy Perry, Hayley Williams, B.o.B. and more
Tim Mosenfelder/Getty
Katy Perry performs at the 2010 Jingle Ball in Los Angeles, December 5, 2010.
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