When Jennifer Lopez signed on to judge this season of American Idol, many wondered why a star of her caliber would sit on the panel of a talent competition. Her performance of "On the Floor" on tonight's live results show answers that question.

Because what better way to reignite a faltering music career than to premiere your new music video on television's most-watched program, as Lopez did in March? And what better way to celebrate the single's success than with an exclusive performance on tonight's episode during May sweeps. Oh, and did I mention that Lopez followed her performance with a preview of the music video for her next single? Because she did.

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You may be from just down the block, Jenny, but we could see this from miles away.

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