Green day-21 guns(guitar cover) Mrz 19, 2017 1,039/Smoothed Out Slappy Hours, 21st century Breakdown, Cover 21 guns, Cover Green, Cover GREEN DAY, Cover Punk Rock, Cover Rock, Hi guys!I’m back with another cover. Hope that you ejoyed! Bai. Like 0 Thanks! You've already liked this « 2017.3.19 jolin tsai – journey mv(cover by me) » Holiday – Green day (acoustic cover)