Another A-list duo is headed to the Billboard Music Awards: Chris Brown and Pitbull will perform their collabo "Fun" during the May 17 awards show.

And that's not all: Fifth Harmony are headed to the 2015 BBMAs to play a special version of "Worth It." Harmonizers, get ready.

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Brown, Pitbull and Fifth Harmony join previously announced performers Mariah Carey, Kelly Clarkson, Imagine Dragons (who will play "Stand by Me" as a tribute to the late Ben E. King), Hozier, Nick Jonas, Tori Kelly, Ed Sheeran, Van Halen, Kanye West, Fall Out Boy featuring Wiz Khalifa, Little Big Town and Faith Hill, Nicki Minaj and David Guetta, Britney Spears and Iggy Azalea, Meghan Trainor featuring John Legend, Wiz Khalifa featuring Charlie Puth and Lindsey Stirling -- not to mention Empire stars Jussie Smollett and Bryshere "Yazz" Gray singing with Estelle.

The 2015 BBMAs air May 17 on ABC at 8 p.m. from Las Vegas.