THE CONCERT EVENT OF THE HOLIDAY SEASON Hosted by Elvis Duran of iHeartMedia’s Z100, New York’s Hit Music Station, the concert was filmed at New York City’s famed Madison Square Garden.  The lineup of musical acts scheduled to perform include Justin Bieber, Ariana Grande, Diplo, The Chainsmokers, Fifth Harmony, Charlie Puth, Lukas Graham, DNCE, and many more including a special guest appearance by Niall Horan. Original airdate: Thursday, December 15, 2016