Record Store Day is this Saturday April 19th and Green Day is one of the many artist releasing Record Store Day exclusive's an album called "Demolicious".  It features 18 tracks including an unreleased song called "State of Shock".  Many of these demos were recorded during the sessions for "Uno","Dos" and "Tre!".  If you want to see a full list of releases for record store day check out a great list here.