LAS VEGAS, NV - SEPTEMBER 20:  (L-R) Musicians Liam Payne, Harry Styles, Zayn Malik, Louis Tomlinson and Niall Horan of One Direction perform onstage during the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 20, 2014 in Las Vegas, Nevada.  (Photo by Ethan Miller/Getty Images for iHeartMedia)