Green Day have released a stream of the newly re-recorded version of their single, "21 Guns." This recording features the band with the cast of their recently unveiled "American Idiot" musical. Although most of the songs in "American Idiot" will come from the album of the same name, '21 Guns' is one of the few from Green Day's most recent album 21st Century Breakdown to be included in the show.

Check it out here.