Watch: Jennifer Lopez Idolized with 'On the Floor' Performance

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On Thursday's 'American Idol,' Jennifer Lopez cranked the energy level up for her glass-shattering performance of 'On the Floor.' She stepped out from behind the judging panel’s desk to take the stage.
Watch her high-impact dance routine with special guest vocals by Pitbull. Fellow judge Steven Tyler told Billboard earlier this week that he'll also take his turn in the "Idol" spotlight when band Aerosmith rocks out on the season finale.