Slipknot frontman Corey Taylor has been added to the bill of this year's Sonisphere festival.Taylor, who will be headlining this year's Kerrang!-sponsored Download festival with Slipknot, will play a special solo set at the UK's newest rock festival which takes place at Knebworth on August 1 and 2.Other acts on the bill include his Slipknot bandmate Shawn Crahan's other band Dirty Little Rabbits, Nine Inch Nails, Avenged Sevenfold, Machine Head, Bullet For My Valentine, Taking Back Sunday, Feeder, Alice In Chains, Anthrax, Fear Factory, Lamb Of God, Airbourne, Thin Lizzy, The Sword, Mastodon, Killing Joke, Skindred, Attack! Attack!, Cancer Bats, Dead By April, Dinosaur Pile-Up, Fighting With Wire, The Ataris, The Chapman family, Twin Atlantic and Rolo Tomassi.Sonisphere will be headlined by Linkin Park (August 1) and Metallica (August 2).Tickets are on sale now from www.aloud.com.