American Music Awards: Rihanna, Ariana Grande, TLC hot to trot

From right, T-Boz and Chilli of the musical group TLC pose with Lil Mama backstage at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Taylor Swift poses backstage with the awards for favorite album - country for "Red", favorite female artist - pop/rock, favorite female artist - country, and artist of the year at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Rihanna poses backstage with the Icon award at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Rihanna poses backstage with the Icon award at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Lil Mama poses backstage at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Ariana Grande poses backstage with the award for new artist of the year at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Austin Mahone, left, and Kendall Jenner present the award for favorite artist - electronic dance music at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Justin Timberlake poses backstage with his awards for favorite male artist - pop/rock, favorite male artist - soul/R&B, and favorite album - soul/R&B for "The 20/20 Experience" at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

Host Pitbull, right, presents the award for artist of the year to Taylor Swift at the American Music Awards at the Nokia Theatre L.A. Live on Sunday, Nov. 24, 2013, in Los Angeles. (AP)

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