Olivia Newton-John says she has breast cancer and is cancelling her June tour.
The 68-year-old singer said Tuesday she initially thought she was suffering from back pain, but learned it was ``breast cancer that has metastasized to the sacrum.''
Newton-John said she will complete ``a short course of photon radiation therapy'' and hopes to perform later this year.
The "Grease" star was scheduled to play two shows at the Fallsview Casino Resort, tomorrow and Friday, both shows have been cancelled.
Anyone with tickets can return them at their original point of purchase for a refund.