Motorhead, Mastodon Join Sonisphere Festival 2011 Line-Up

Motorhead and Mastodon have been added to the line-up for this year's Sonisphere festival in Knebworth.

Other new additions to the bill at the event, which runs from July 8-10, include In Flames and Parkway Drive.

They join previously announced headliners Biffy Clyro, Slipknot and the Big Four - Metallica, Slayer, Megadeth and Anthrax.

Tickets are on sale now.

(by Jason Gregory)

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