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Jennifer Lopez at iHeartRadio Festival in Las Vegas (Video)

Video: See Jennifer Lopez Get Down on Stage as Kelly Clarkson, Lady Gaga, Jay-Z, and More Perform in Vegas!

Jennifer Lopez wowed the crowd at the iHeartRadio festival over the weekend, where she sang some of her recent hits and old favorites for fans. But she was just one of the many famous artists at the two-day event; other performers included Kelly Clarkson, Jay-Z, and Lady Gaga! Take a look at all of the musicians as they jam out, and get the scoop on Jennifer's flirty moves with one of her male dancers at the afterparty.

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