Billie Joe Armstrong of Green Day performed 'Basket Case' on an ice cream truck at San Diego Comic-Con and joined forces with Bruce Dickinson for a David Bowie tribute, while also unveiling a limited-edition guitar and amp. Meanwhile, a supergroup featuring members of Green Day, blink-182, and Rancid was formed to honor the Ramones, and a film inspired by Green Day's music is set for theatrical release.