LAS VEGAS, NV - SEPTEMBER 20: (L-R) Recording artists Niall Horan, Harry Styles, Liam Payne, Zayn Malik, and Louis Tomlinson of music group One Direction attend the 2014 iHeartRadio Music Festival at the MGM Grand Garden Arena on September 20, 2014 in Las Vegas, Nevada. (Bryan Steffy/Getty Images for iHeartMedia/AFP)