Watch Harry Styles Grab Niall Horan's Crotch After Winning Billboard Music Award

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Harry Styles, Liam Payne, Louis Tomlinson and Niall Horan of One Direction attend the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada.  

When One Direction won one of two Billboard Music Awards on Sunday night (May 17), the guys were naturally pretty happy.

So as they made their way from the audience to the stage, it's no surprise that they got a little goofy. From the video, it appears an excited Harry Styles jokingly grabbed bandmate Niall Horan's crotch. Both of the guys laughed and made their way up on stage.

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Naturally, the Internet quickly documented the moment. What? indeed.