LMFAO lights up the AMAs

Justin BieberDavid HasselhoffYouTube
Okay, we're still not sure what happened, but all we know is that when LMFAO closed out the Amercian Music Awards with its two existing singles, we were unable to look away. The crazy started when the "band" members started dropping trou to reveal boxers adorned with happy faces. Then -- BAM --... Getty Images
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