Rock group Green Day gave their hit musical American Idiot a loving send off after the show's April 24 closing performance. Rockers Billie Joe Armstrong and his bandmates Tre Cool and Mike Dirnt delivered a surprise concert after the show. "This is not a f**king party, this is a f**king celebration!" Armstrong yelled at the top of his lungs onstage at the St. James Theatre. Throughout the night, the Idiot cast rocked out alongside the band as they tore into fan favorites like "Holiday," "Welcome to Paradise" and "Burn Out." Click below to relive a wild night that Broadway won't soon forget!