Won't you stand? Won't you stand by me? Imagine Dragons performed this classic track at the 2015 Billboard Music Awards. Watch them do so here.
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The Breakfast Club Forever! Simple Minds will always have a place in our hearts thanks to "Don't You Forget About Me," which they perform here at the Billboard Music Awards.
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Mariah Carey debuted the song "Infinity" at the 2015 Billboard Music Awards. She also included with it a medley of past hits. But did she hit all the right notes?
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Talk about an unexpected duet. But Meghan Trainor and John Legend very much made it work while taking to the stage at the 2015 Billboard Music Awards.
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Nick Jonas brought his talent and his good looks to the 2015 Billboard Music Awards. Check out this performance of "Jealous" now!
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Fall Out Boy was joined by Wiz Khalifa for this rendition of "Uma Thurman." They performed it at the 2015 Billboard Music Awards.
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BOO! HISS! AWKWARD! Kendall Jenner and Kylie Jenner got booed when introducing Kanye West at the 2015 Billboard Music Awards. Check out the video here.
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Carrie Underwood and Miranda Lambert and their Billboard Music Awards performance of "Something Bad" in May 2014.
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