Sum 41 have been forced to pull out of the Kerrang! Relentless Energy Tour which is set for two performances in Dublin's Academy on 4th and 5th February. Sum 41 front-man Deryck Whibley is suffering from a back injury and has taken advisement from doctors to withdraw from the tour.

"I feel really terrible about letting down the fans," says Deryck. "I injured my back and the doctors are saying that I could be in a wheelchair. So, as much as I wanted to be able to do it, I've got to look at reality, and for the first time I've got to listen to somebody else and not just myself. We're all really upset about this; we've had such a great relationship with our UK fans. We were really looking forward to this tour."

The Blackout have been confirmed to take the place Sum 41.

"We're delighted to step in for Sum 41 at the last minute!" says The Blackout's co-vocalist Sean Smith. "We've played the tour once before [in 2010] and we know what a total laugh it is. But hopefully Sum 41 fans won't try and murder us! This should be a really, really great tour and we're all really excited to watch the other bands every night."