Mike Dirnt and Tre Cool surprised the frontman with the outfits at the end of the gig
The show occurred at the O Son do Camino festival in Monte do Gozo, Spain
The group performed Van Halen’s ‘Dance The Night Away’ and ‘Ain’t Talkin’ ‘Bout Love’
“I like to organically find new things. All I can say is just clear your search history to find new [stuff]," bassist Mike Dirnt said