What's something no rock or metal vocalist should ever do before going onstage? We asked the vocalists of I Prevail, Killswitch Engage, PeelingFlesh, Armored Saint, Badflower, ERRA, Exodus, Filter, From Ashes to New, Shadow of Intent, The Devil Wears Prada, The Funeral Portrait and GWAR and found out! In the video compilation below, we've isolated our question about what a singer shouldn't do before going onstage. Some of these vocalists even sprinkled in some advice on what you should do before a show! Don't Do THIS Before Going Onstage