From F-bombs to rehab! After an explosive tirade that left his guitar in pieces during the 2012 iHeart Radio Music Festival, Billie Joe entered treatment for substance abuse. (He spent three months in rehab but is "getting better every day" according to a New Year's Eve post on the band's website.) But this rebellious behavior is nothing new. In 2004, Green Day's "American Idiot" took aim at President Bush for the war in Iraq in their song "Holiday," calling him "President Gasman." But Billie Joe proved he was a real rebel in 2011 when he told his Tweeps that he "Just got kicked off a Southwest flight because my pants sagged too low!"