Singer and actress Olivia Newton-John has been diagnosed with Breast Cancer. The 68-year-old "Grease" star recently revealed that her breast cancer has ‘metastasized’ to the sacrum and that she is currently undergoing radiation treatments.

Fans show love and support for Olivia Newton-John.

According to a report from Radar Online, Newton-John had already postponed her upcoming tour dates due to what, at the time, she believed was sciatica complications. Seeking care for what was first believed to be minor back pain has now turned into a medical nightmare for Olivia.

'Grease' star lost her sister Rona to brain cancer in 2013.

An announcement posted to the singer's official website confirmed Olivia's cancer diagnosis and upcoming treatment plans.

In addition to natural wellness therapies, Olivia will reportedly complete a short course of photon radiation therapy. She is confident she will be back later in the year, better than ever, to celebrate her shows.

In a personalized statement on Facebook from the singer herself, she revealed that she came to her treatment decisions after meeting with her oncologist and a natural therapist. They all practice at the Olivia Newton-John Cancer Wellness and Research Centre in her home town and country of Melbourne, Australia.

In her Facebook post, the "Grease" star added that her husband John is taking great care of her. She went to thank all of her family, friends, and fans for all their love, support, concern and prayers.

Olivia also revealed in her statement that this would be the only time she would be addressing the public about her breast cancer diagnosis as she plans to place all of her energy on her treatment and getting well.

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This is Olivia Newton-John's second battle with breast cancer. The "Hopelessly Devoted To You" singer successfully battled the disease in 1992. During that time the singer underwent a partial mastectomy, chemotherapy and breast reconstruction.

Olivia's daughter, Chloe Lattanzi, 31, has asked for support and healing prayers for her mother. According to New Idea, sources close to Newton-John state that they have been very worried about their friend and that her current condition was so "debilitating that the singer had been unable to walk, or get out of bed."

This is sad news. Our best wishes for a speedy and full recovery go out to Olivia Newton-John as she courageously continues to battle cancer.