It sure does sneak up on you. The 2012 Rock the Bells festival is going down real soon and to ring it in Guerilla Union has partnered with DatPiff for the annual official mixtape. DJ Muggs put together the mix which is hosted by master of ceremonies Supernatural. It features music from Murs, DMX, Ice Cube, Atmosphere, Xzibit, Casey Veggies, Tech N9ne, RZA, Sean Price and more. And you can download it for free here. Cover and track list in the gallery (click to see full size).