Original: Rock On The Net: Green Day Green Day's 2004 rock opera American Idiot reignited the band's popularity with a younger generation, selling five million copies in the U.S. The band's eighth studio album, 21st Century Breakdown, was released on May 15, 2009.
Simplified: Rock On The Net: Green Day Green Day's 2004 rock opera American Idiot sold five million copies in the United States.