Other big winners included boy band One Direction, who nabbed favourite pop/rock band, duo or group and artist of the Year.
The Weeknd, who took home favourite soul/R&B artist and favourite soul/R&B album; and Nicki Minaj, who won favourite rap/hip-hop artist and favourite rap/hip-hop album.
Carrie Underwood won the favourite female artist award in country music category.
Ariana Grande bagged the favourite female artist trophy in pop/rock category, reported Variety.
Favourite artist in the electronic dance music category went to DJ Calvin Harris.
Jennifer Lopez hosted the awards show, airing live on ABC from Los Angeles' Microsoft Theatre.