Miranda Lambert and Carrie Underwood will debut their duet, "Somethin' Bad," on Sunday'sBillboard Music Awards.

'Ran says this will be the first time the two have sung the song live, and she's a bit nervous...

Miranda said:

"Singing with someone as powerful as she is pushes you as a vocalist. She's a hoss. And so I'm nervous and I'm excited. I'm excited for people to see two female country artists up there on stage together. That doesn't happen that often. So we're just going to go rock it."

"Somethin' Bad" is a track from Miranda's new album, Platinum, which comes out on June 3rd. The Billboard Music Awards will air live from the MGM Grand Garden Arena in Las Vegas on Sunday at 7 p.m. Central on ABC.

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