Iron Maiden frontman Bruce Dickinson, Jethro Tull frontman Ian Anderson and the Moody Blues' singer Justin Hayward have signed on to take part in "Canterbury Rocks at Christmas," a holiday themed musical eveny taking place December 10th at the legendary Canterbury Cathedral in Kent, England.  Proceeds from the event will go to the Canterbury Gift, a fund set up to raise money for renovations on the famous building.

At 900 years old, the Canterbury Cathedral is considered one of the most important sites in Britain's Christian heritage, and is desperately in need of repairs.