![iHeartRadio Music Awards 2014 Performances Include Usher, Kendrick Lamar, Pharrell & Ariana Grande [VIDEO]](http://townsquare.media/site/625/files/2014/05/iheart.jpg?w=980&q=75)
iHeartRadio Music Awards 2014 Performances Include Usher, Kendrick Lamar, Pharrell & Ariana Grande [VIDEO]
Chart-topping superstars Usher, Kendrick Lamar, Ariana Grande and others rocked the stage at the 2014 iHeart Music Awards in Los Angeles on Thursday (May 1).