Green Day singer Billie Joe Armstrong will reportedly seek treatment for substance abuse following his meltdown onstage at the iHeartRadio Festival in Las Vegas. At the show, Armstrong went into an expletive-filled tirade after noticing a clock that had counted down to one minute left in their set. At the time, the band was in the middle of their seventh song, ‘Basket Case,’ when Armstrong stopped mid-lyric to begin his [...]