Ariana Grande Jazzes Up the AMAs with The Weeknd: Watch

Ariana Grande and The Weeknd
Kevin Winter/Getty Images

Ariana Grande and The Weeknd perform onstage at the 2014 American Music Awards at Nokia Theatre L.A. Live on November 23, 2014 in Los Angeles, California.

Ariana Grande and The Weeknd lit up the stage at the American Music Awards.

Full AMAs Coverage Here | Live Blog

Grande, dressed up in a long black dress, started "Problem" backed by a sax, in a big band version of the hit tune.

"Problem" transitioned into "Break Free," and then finally into "Love Me Harder," when The Weeknd joined the singer.