Slipknot, Rob Zombie and Limp Bizkit have all been announced to play Rocklahoma 2021.The festival takes place from September 3-5, and will see all three acts topping the bill on a line-up that also includes the likes of Halestorm, Anthrax, Falling In Reverse, Motionless In White, Andrew W.K., Knocked Loose and many more.“Cannot wait until we play Labor Day Weekend in Pryor, Oklahoma,” said Slipknot’s Clown. “Our first time at a festival is always very special.