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LAS VEGAS, NV - MAY 17: (L-R) Recording artists Louis Tomlinson, Niall Horan, Harry Styles and Liam Payne of One Direction accept the Top Duo/Group award onstage during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jeff Kravitz/BMA2015/FilmMagic)

LAS VEGAS, NV - MAY 17:  (L-R) Recording artists Louis Tomlinson, Niall Horan, Harry Styles and Liam Payne of One Direction accept the Top Duo/Group award onstage during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada.  (Photo by Jeff Kravitz/BMA2015/FilmMagic)