Coldplay’s Chris Martin joined Kings of Leon on stage as the band’s Mechanical Bull stopped at the Hollywood Bowl in California. As a part of the band’s “Song for the City” campaign, where they allow fans to vote on a rare song to make it into the setlist, the Nashville rockers delivered “Talihina Sky” with the help of Martin. He would also stick around for the classic KoL track, “Notion.”

“Talihina Sky,” a secret track on the band’s debut Youth & Young Manhood, featured Martin on the original studio track, adding vocals and piano.