The lineup for the 2011 Rockstar Energy Drink Mayhem Festival have been announced. Disturbed, Godsmack, & Megadeth joined by Machine Head, Trivium and In Flames on the main stage. The Jagermeister stage will feature Unearth, Kingdom of Sorrow, Red Fang and the Jagermeister Battle of The Bands Winner. The Extreme stage will spotlight Suicide Silence, All Shall Perish and Straight Line Stitch. Dates here.