Bieber, Ke$ha at KIIS-FM's 'Jingle Ball'

The hottest ticket in town was for the second night of KIIS-FM's "Jingle Ball" at the Nokia Theatre LA Live in Los Angeles.

Pop star Justin Bieber performs during the second night of KIIS-FM's "Jingle Ball" at the Nokia Theatre LA Live on Monday, Dec. 3, 2012, in Los Angeles. (Chris Pizzello/Invision/AP)

Pop star Justin Bieber performs during the second night of KIIS-FM's "Jingle Ball" at the Nokia Theatre LA Live on Monday, Dec. 3, 2012, in Los Angeles. (Chris Pizzello/Invision/AP)

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