Brad Paisley Performs Live Alongside Demi Lovato in Central Park

The country music and pop vocalist sang the duet “Without a Fight" on "GMA."

"Well, the song, actually I thought would be a duet, but I didn't know who it would be," Paisley said. "After meeting this next performer [Lovato] who's going to perform with me, I just thought, 'It's got to be her.'"

This was the second concert series collaboration for Paisley and Lovato, who last week performed "Stone Cold" live in Central Park.

"It's always been in my blood," Lovato said on her love for country music. "I'm from Dallas."

"We have had a great time hosting the show...it's really been a blast being in a partnership with her," Paisley said of Underwood.