Well, she didn't sing -- she just let her trademark booty do the talking.
She couldn't contain her excitement after the finale aired after she noticed that Aguanile was a trending topic on Twitter.
"Look baby!!! @MarcAnthony!!!!!! #aguanile on @AmericanIdol," Lopez tweeted along with a screen capture of the trend.
Anthony and J. Lo weren't the only performers on the American Idol season finale -- Carrie Underwood, Lady Gaga, Beyonce and TLC were among those who showed up to celebrate the end of the 10th season.
"Me and her have been together since day one and we're gonna stay together," Scotty McCreery said of the runner-up, Lauren Alaina.
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