Green Day's Billie Joe Armstrong Performing With Joan Jett
Watch Joan Jett joining the Green Day frontman for a medley of 'American Idiot' and 'Bad Reputation'
Armstrong opened with 'Devil's Kind', one of several songs he has written for the film, in which he plays a former punk rocker still struggling to adjust to everyday life 10 years after his band broke up.
He then played Green Day's 'Scattered' before Jett joined him for a brief burst of 'American Idiot' which segued into her classic 1980 hit 'Bad Reputation'.
Watch fan-shot footage.