$ 0 0 Rihanna accepts the award for artist of the year at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Billy Ray Cyrus accepts the award for best lyrics on behalf of Miley Cyrus at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Ariana Grande speaks at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Austin Mahone accepts the award for iHeartRadio Instagram at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Dan Reynolds, and from left, Daniel Platzman, Ben McKee, and Wayne Sermon of the musical group Imagine Dragons, accept the award for alternative rock song of the year for 'Demons' at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles. Rihanna, winner of the award for song of the year for 'Stay', left, hugs Sean 'Diddy' Combs at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Blake Shelton accepts the award for country song of the year for 'Boys 'Round Here' at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.Pharrell Williams accepts the award for iHeartRadio innovator at the iHeartRadioMusicAwards at the Shrine Auditorium on Thursday, May 1, 2014, in Los Angeles.