Stapleton was Mayer's surprise guest on the Nashville stop of his "Evening with John Mayer Tour", and joined the "Daughters" singer for a brand new duet.
Introducing "I Just Remembered That I Didn't Care", Mayer said, "I'd like to invite a friend to the stage. I texted this friend and said, 'Hey, I'd love to have you sit in'. I said, 'Do you want to do one of your songs or one of my songs?' And he said, 'We can do either, or we can just write a song and then go play it...'"
"I said, 'Challenge accepted'. I got to town yesterday, we met up in the studio, we wrote this song yesterday, and we’re going to play it for you."
Stapleton hung around for one more song - a rendition of Mayer's "Slow Dancing in a Burning Room".