Say what you want about Jennifer Lopez—go ahead, we'll wait until you're done saying those things. Finished? OK, cool—but there's no denying that she can obliterate the stage at a televised event. Her relentless medley of "Until It Beats No More," "Papi," and "On The Floor" at last night's inconsequential American Music Awards took advantage of every award show performance convention ever: the ballad-as-intro, the choreographed dance breakdown, the rap cameo (by Pitbull), the gradual costume strip show. She even managed to squeeze a Fiat commercial into the middle of it.