Tyler Hubbard and Brian Kelley of Florida Georgia Line

Tyler Hubbard and Brian Kelley of Florida Georgia Line perform during the Dig Your Roots 2016 Tour at PNC Bank Arts Center on Aug. 4, 2016 in Holmdel, New Jersey.  

J. Kempin/Getty Images

The excitement continues to build for next weekend's Billboard Music Awards with news of John Legend and Florida Georgia Line performing a live duet at the awards show on Sunday, May 21, live from Las Vegas.

The unexpected duo is set to perform together alongside other locked-in performances from The Chainsmokers, Halsey, Ed Sheeran, Miley Cyrus and many more.

Also on Friday (May 12), Ludacris and Vanessa Hudgens were announced as this year's Billboard Music Awards hosts. It's Luda's fourth straight year in the role and Hudgens' first go-round.

The 2017 Billboard Music Awards will air live Sunday, May 21, at 8 p.m. ET/ 5 p.m. PT on ABC.