Who performed the best summer concert this year? Was it Korn and the Retun of the Dread tour? I saw them in Las Vegas and they put on a great show. Slipknot and Marilyn Manson also put on a great show in Seattle. Disturbed came back after a long hiatus and put a great show in Chicago. Megadeth is also back on tour. So whos putting on the best show for the Summer of 2016?