The episode, taped recently before an invitation-only audience in Nashville, will premiere on Friday, June 18, at 10 p.m. on CMT.
The duo performed several hit songs including Urban’s “Sweet Thing,” “If Ever Could I Love,” and “Til Summer Comes Around” and Mayer’s “Perfectly Lonely” and “Gravity” and George Michael's "Faith."
Check out the sneak peek video for John Mayer and Keith Urban’s duet "Sweet Thing" below: