Before headlining Coachella on Saturday (April 12), Billie Joe Armstrong of Green Day surprised fans by performing with the Go-Go’s during their Friday afternoon set. Armstrong joined the Rock and Roll Hall of Fame band on a spirited rendition of their 1984 hit, “Head Over Heels,” with the punk icon playing guitar and singing lead vocals on the tune. This unexpected collaboration was teased on Green Day’s Instagram earlier in the day, with Armstrong instructing fans “Go see the go gos . A special surprise 😉.” Guitarist Jane Wiedlin gushed about their surprise pairing on her personal Instagram after the show, sharing a photo of her and Armstrong performing together and captioning the post: “A lot to process this morning and I will be posting a lot about yesterday at Coachella, but first and most importantly, having my hero and favorite living songwriter #BillieJoeArmstrong rock Head Over Heels w us was the honor and thrill of a lifetime!” (Rolling Stone)