WATCH: One Direction Performs on The X Factor Finale USA 2013

Published:9:41 pm EDT, December 19, 2013| Updated:9:45 am EDT, December 20, 2013|

Watch out, ladies ... and gents. The One Direction boys are back again on The X Factor USA stage to perform at their finale episode this season. Dressed pretty casually this time, the guys rocked out, performing their song "Midnight Memories." Of course, the crowd went wild.

After their performance, the 1D guys said they're going to go home for the holidays and get really fat, eating all their holiday food. Harry Styles insisted that he's been nice this year ... though many girls out there probably wish he'd be a little more naughty ...

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