Photos:: Billboard Music Awards 2015 | Show highlights

Zendaya, left, Martha Hunt, Taylor Swift, Lily Aldridge, Hailee Steinfeld and Ellen Pompeo appear at the Billboard Music Awards at the MGM Grand Hotel in Las Vegas on May 17.

Danica McKellar presents the award for top rap song.

Iggy Azalea, left, and Charli XCX accept the award for top rap song for “Fancy.”

Mariah Carey performs.

Idina Menzel speaks onstage.

John Legend and Meghan Trainor perform.

Wiz Khalifa performs with dancers.

Tracee Ellis Ross, left, and Laverne Cox present the award for top Billboard 200 album.

Taylor Swift accepts the award for top Billboard 200 album for “1989.”

Wolfgang Van Halen, left, and Eddie Van Halen perform.

Joe Trohman, left, Patrick Stump, Andy Hurley and Pete Wentz of Fall Out Boy perform.

Charli XCX, left, and Lily Aldridge present the award for top duo/group.

Louis Tomlinson, Niall Horan, Liam Payne and Harry Styles of One Direction accept the Top Duo/Group award.

It’s just recording artist Ed Sheeran, his guitar and a bright screen behind him onstage.

Brian Kelley, left, and Tyler Hubbard introduce a performance by Little Big Town & Faith Hill.

Faith Hill and Karen Fairchild of Little Big Town perform.

“Grey’s Anatomy” actress Ellen Pompeo presents the award for top female artist.

Hozier performs.

Meghan Trainor accepts the Top Hot 100 Song award for “All About That Bass.”

Pitbull, left, and Chris Brown perform.

Ludacris presents a tribute to B.B. King.

Recording artist Nick Jonas performs “Jealous.”

Charlie Puth, left, Wiz Khalifa and Lindsey Stirling perform with an image of “Furious 7” actor Paul Walker in the background.

Nicki Minaj, front center, and DJ David Guetta perform at the 2015 Billboard Music Awards.

Tyrese, left, and host Ludacris introduce a performance by Wiz Khalifa, Charlie Puth and Lindsey Stirling.

Wiz Khalifa performs.

50 Cent and Rita Ora present the award for top Hot 100 song.

Meghan Trainor accepts the award for top Hot 100 song for “All About That Bass.”

Tori Kelly performs.

The inaugural “American Idol” winner Kelly Clarkson performs.

Molly Ringwald introduces a performance by Simple Minds.

Simple Minds performs a tribute to the 30th anniversary of “The Breakfast Club.”

Celine Dion presents the award for top male artist.

“Empire” actress Taraji P. Henson speaks onstage.

“Empire” actors-singers Jussie Smollett, left, and Bryshere Y. Gray perform.

Charlie Puth performs.

Brian Kelley, left, and Tyler Hubbard of Florida Georgia Line accept the award for top country artist.

Kanye West performs as the closing act.