Jessie J, Ariana Grande and Nicki Minaj perform their hit song Bang Bang at the American Music Awards 2014.
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One Direction brought the crowd to its feet with "Night Changes" at the 2014 American Music Awards. Watch the performance now.
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Jennifer Lopez and Iggy Azalea perform "Booty" at the 2014 American Music Awards.
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Taylor Swift kicked off the American Music Awards with a performance of "Blank Space." Watch her set the stage on fire now.
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Selena Gomez didn't merely perform "The Heart Wants What It Wants" at the 2014 Video Music Awards. She broke down on stage while singing about Justin Bieber.
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Did Justin Timberlake mock Taylor Swift at the AMAs? You decide!
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A Great Big World and Christina Aguilera perform their hit song "Say Something" at the American Music Awards.
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Katy Perry's American Music Awards performance of "Unconditionally" in 2013.
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