Olivia Newton-John
Olivia Newton-John's concerts in the United States and Canada have been postponed as the singer undergoes treatment for breast cancer. Pictured: Newton-John at the 85th annual Hollywood Christmas Parade in Los Angeles on Nov. 27, 2016. Reuters/Phil McCarten

Olivia Newton-John recently announced the postponement of her tours in the United States and Canada after she found out that her breast cancer had returned.

According to BBC News, the “Grease” star was told that the back pain she has been experiencing was due to the fact that her cancer has already spread to her spine. Newton-John was also previously diagnosed with breast cancer, but it has been 25 years since she recovered from the disease. The singer will immediately undergo treatment, and she is expected to resume her tour towards the end of the year.

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Newton-John’s rep released a statement confirming her diagnosis, saying, “The back pain that initially caused her to postpone the first half of her concert tour, has turned out to be breast cancer that has metastasized to the sacrum. In addition to natural wellness therapies, Olivia will complete a short course of photon radiation therapy and is confident she will be back later in the year, better than ever, to celebrate her shows.”

Meanwhile, Newton-John also postponed her shows last month, as well as her fan meet and greet, due to her back pains, according to the Los Angeles Times. Earlier this month, the 68-year-old singer’s daughter, Chloe Lattanzi, asked her mom’s fans for their prayers. A source close to the singer and her family told People at the time that Newton-John is doing well and has already started her treatment.

Newton-John is an American-Australian singer and songwriter who is also a four-time Grammy award winner. She has five no. 1 hits and 10 other Top 10 Billboard Hot 100 singles to her name. She is also a longtime activist for environmental and animal rights issues. Since her first cancer diagnosis in 1992, she has become an advocate for health awareness as well.

The “You’re the One That I Want” singer also put up the Olivia Newton-John Cancer Wellness & Research Centre, an organization that provides patients with treatment and care partnered with wellness programs to support the mind, body and spirit. At present, the foundation has over 200 clinical trials in progress that they hope can provide access to new and breakthrough therapies.