1 of 10

Cher performs "Believe".
Credit: Reuters
2 of 10

Singer Camila Cabello performs.
Credit: Reuters
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3 of 10

Camila Cabello performs.
Credit: Reuters
4 of 10

Halsey performs "Now or Never."
Credit: Reuters
5 of 10

Hosts Vanessa Hudgens and Ludacris.
Credit: Reuters
6 of 10

Halsey performs "Now or Never."
Credit: Reuters
7 of 10

Celine Dion performs "My Heart Will Go On."
Credit: Reuters
8 of 10

Musicians Alex Pall (L) of The Chainsmokers, Halsey (C), and Andrew Taggart of The Chainsmokers accept the award for Top Hot 100 Song "Closer."
Credit: Reuters
9 of 10

Julia Michaels performs "Issues".
Credit: Reuters
10 of 10

Singer Jason Derulo performs.
Credit: Reuters