Weezer, Airbourne and Architects have all been announced to play this year's Sonisphere festival at Knebworth (8th-10th July). They'll be joining the likes of: Metallica Slayer Megadeth Anthrax Biffy Clyro Diamond Head In Flames Mastodon Motörhead Parkway Drive You can find out more about Sonisphere by heading to www.sonispherefestivals.com