(CNN) Australian superstar Olivia Newton-John has revealed she is again battling cancer, her third diagnosis in three decades, during an interview broadcast on Sunday night.

Speaking to CNN-affiliate Seven's "Sunday Night," the singer-songwriter said was treating the cancer with "modern" medicines and natural remedies after being told in 2017 she had cancer at the base of her spine.

"My husband's always there, and he's always there to support me, and I believe I will win over it and that's my goal," she told Seven.

Newton-John, who will turn 70 in a few weeks, was catapulted to fame when she starred opposite actor John Travolta in the high school musical "Grease."

Jeff Conaway, Olivia Newton-John, John Travolta and Stockard Channing walk arm in arm at a carnival in a still from the film, 'Grease.'

Since then she has released multiple number one hit singles as well as touring internationally. In 2017 she was touring the United States with her new album "Live On."

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