Olivia Newton-John will postpone her June U.S. and Canadian concert dates, due to her latest battle with breast cancer.

Newton-John, 68, was originally diagnosed with the disease in 1992, but was later proclaimed cancer free after receiving chemotherapy and a partial mastectomy. However, in a statement on her website and Facebook page Tuesday (May 30), the singer announced that the cancer has returned.

Newton-John had already postponed the first half of her concert tour due to back pain, which was actually an effect of the breast cancer that had metastasized to her sacrum. In her statement, Newton-John noted she will be seeking natural wellness therapies and completing a short course of photon radiation therapy to battle the disease once again.

The Aussie singer, who opened the Olivia Newton-John Cancer Wellness and Research Centre in Melbourne, Australia, after her initial cancer battle, said she decided on her direction of therapies after consulting with her doctors, natural therapists and medical team at the aforementioned institute. Though a disheartening moment for the former CMA winner, Newton-John is confident she will return to the stage later in 2017 “better than ever, to celebrate her shows.”

Rescheduled concert dates will be posted at OliviaNewton-John.com in the coming weeks. Ticket buyers for the postponed shows should contact venues directly about refunds.

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