She has been open and honest about using medical cannabis following her diagnosis with stage-four breast cancer.
And actress Olivia Newton-John believes that openness has even helped changed legislation - such as Canberra's recent legalisation of the drug.
Speaking to the Courier Mail on Friday, the 70-year-old said, jokingly: 'It's all my doing!'
She added: 'In all seriousness I hope we played some part in it. We talked to the politicians about how the public are really wanting this change.'
Her own battle with breast cancer has been immensely aided by medical cannabis, the singer said.
'It was instant. I felt a big change in my mobility and pain relief. It got me off morphine, which is a huge deal,' she added.
Olivia also spoke about her health battle during an appearance at a cancer research conference in Melbourne last month.
The Grease actress was in discussion with Professor Grant McArthur at the Victorian Comprehensive Cancer Centre Research Conference.
On the conference's Twitter page, Olivia was quoted as saying: 'The ultimate goal is to heal people from cancer. We are lucky with our ability to access great treatments in Australia.'
The Xanadu star was diagnosed with breast cancer in 2017. She had previously battled the disease twice, in 1992 and 2013.
Olivia has made no secret of the fact she uses medical cannabis to deal with pain and improve her quality of life while undergoing other treatments.
The icon was introduced to herbal medicine by her husband John Easterling, who is the founder of the Amazon Herb Company.
Originally published here: https://www.dailymail.co.uk/tvshowbiz/article-7537093/Olivia-Newton-John-says-trip-Canberra-helped-state-decide-legalise-medical-marijuana.html