Z100's Jingle Ball 2010

Every winter, the pop station brings a slew of stars to Madison Square Garden to play short sets for the kids—play to be played? Never! This year's performers include Katy Perry, Justin Bieber, B.o.B, Selena Gomez, Bruno Mars, Travie McCoy, Michael Bublé, Paramore, Enrique Iglesias and Taio Cruz. Special guest hosts include Kim Kardashian and the popular DJ—watch your back, Grandmaster Flash!—Pauly D.