In 1989, the group ditched the name Sweet Children in order to avoid confusion with another local band, Sweet Baby. They settled on the name Green Day - and welcomed new drummer Cool - and it ...

and their set featured a surprise appearance from Green Day frontman Billie Joe Armstrong. Armstrong appeared on the stage for the band's performance of "Head Over Heels," off their third album ...

Along the way, we ask all the big questions about Green Day during this peak run: What made the trio such a central band to rock music in the era of emo and stadium indie? Is there really enough ...