One of the highlights from the CMA Awards on Nov. 13 was the cross-genre collaboration between Lady Antebellum and indie pop star Halsey.

The collaboration kicked off as the artists joined forces on “What If I Never Get Over You,” a current Top 10 single that is featured on Lady A’s new album, Ocean. With Lady A’s Dave Haywood on piano, Charles Kelley and Hillary Scott harmonized the first verse before Halsey joined them.

The artists transitioned to Halsey’s “Graveyard,” which is featured on her upcoming album, Manic. Halsey plucked a guitar and began singing the song before Hillary and Charles joined her.

Watch Lady A and Halsey perform below.