The country star also debuted a new song with Bailey Zimmerman called "Backup Plan," and later showed up as the Backstreet Boys' guest Luke Combs had a few surprises up his sleeve for his headlining set at Stagecoach.

Luke Combs threw a whole lot of exciting curveballs during his headlining Stagecoach set on Sunday (April 27), and one of them was an appearance from pop-punk rockers Good Charlotte. The band's Benji and Joel Madden hopped onstage with Combs to perform "The Anthem," a 2003 mega-hit off their first studio album.

The musician took his own turn popping up during another artist's performance when he joined Backstreet Boys for "I Want It That Way" later that night