Olivia Newton-John has urged women to "trust their instincts" when it comes to their health.
The 72-year-old singer-and-actress has reflected on her 1992 breast cancer diagnosis and how she kept pushing for further testing, despite her results continually coming back clear.
In a video announcing her new ONJ Foundation, which will help others who have survived cancer, she grew emotional and said: "I am probably one of those people who is living beyond cancer, living beyond probably what people expected to happen.
"I knew immediately something was wrong.
"I had a mammogram. The mammogram was benign and I had a needle biopsy that was also benign.
"I don't say this to scare women, but you have to just trust your instincts."
The 'Grease!' star explained how she then underwent a surgical biopsy and was eventually diagnosed with breast cancer, plunging her into "terror".
She continued: "All this was overwhelming. It was a feeling of dread, terror, the unknown."
But Olivia vowed to fight the disease for the sake of her daughter, Chloe Lattanzi.
She said: "I made the decision that I would be okay. I had to believe I was going to be okay, that my daughter was the most important thing in my life and I would be okay for her."
Over the years, the 'Physical' singer has tried various alternative therapies including meditation, acupuncture and medical cannabis, which is grown by her husband John Easterling at their California home, and she's a big advocate for the "kinder" treatments.
She said: "I have seen the incredible beauty of the plants and their healing abilities. If I hadn't had that experience, I wouldn't be sitting here talking to you about kinder therapies... your body wants to heal itself. That's why I'm excited to start this foundation."
Olivia was diagnosed with the disease again in both 2013 and 2017 but revealed earlier this year that her tumours had shrunk in size.