Backstage at Jingle Ball with 5 Seconds of Summer, Ellie Goulding and more

KISS FM’s Jingle Ball 2015 kicked off its first show Tuesday night at the American Airlines Center. The star studded line up included 5 Seconds of Summer, DNCE, Zedd, Charlie Puth, Ellie Goulding, Tove Lo, Shawn Mendes, One Direction, Calvin Harris and Demi Lovato.