The Karma Chameleon hitmaker has been ordered by specialists not to sing after they discovered a polyp in his throat, forcing the group to pull all upcoming concerts.
Members of the band said in statement they are "devastated" about the cancellation of the tour, which was due to take place over November and December (14), and they thanked fans for standing by them.
The band said, "We are hoping we can reschedule the concerts for next year, and hopefully George's problem will be resolved... To our fans we wish to thank you for your loyalty and know that we love you all."
A spokesperson for the group added, "George and the band are devastated by this news and so it is with much regret that the tour is cancelled until further notice. Refunds are available at the point of purchase."