Olivia Newton-John's daughter opens up about drug addiction 'fight' amidst mum's cancer battle

Olivia Newton-John's daughter Chloe Lattanzi has revealed she decided to tackle her substance addiction "head-on" so she could help her mother through her cancer battle.

The 70-year-old actress was diagnosed with breast cancer for the third time last year, and her 33-year-old daughter - whom she has with ex-husband Matt Lattanzi - has opened up about her "fight" to stay sober and how she entered rehab so she could be "happy and bright" around her mum through her health struggles.

Appearing on Australia's TV show, 60 Minutes, Chloe - who has also suffered from anorexia - admitted: "We say we all have our cancers."

"You know, mine is my battle with addiction," she said during her interview.

"I have to keep myself sober the rest of my life and that’s a fight and it takes work."

"I’m not trying to make her struggle sound small, I’m trying to say, I think it makes it easier to deal with when you go, 'Oh yeah, everyone has a cancer.'"

On her decision to go to rehab in 2013 and her "severe depression", Chloe said: "I wanted to be bright and happy and available and around for my mum when she was struggling with this and I thought I was okay but I wasn’t, I was still struggling with severe depression and I faced it head-on."

In the same interview with 60 Minutes reporter Liz Hayes, Olivia revealed how she's grappled with her cancer diagnosis.

"When you’re given a cancer diagnosis or a scary illness diagnosis, you are suddenly given a possibility of a time limit," she explained.

"If you believe the statistic, you’re going to make them happen. If somebody tells you, 'you have six months to live', very possibly you will – because you believe that."

"I’m so lucky that I’ve been through this three times and I’m still here. I’m living with it," she continued.

"Everyday is a gift now, particularly now."

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The 'Hopelessly Devoted to You' singer was diagnosed with breast cancer in June 2017. She also has a tumour in the base of her spine.

In September last year, the star told Sunday Night she had decided to treat this cancer with "modern" medicines and natural remedies.

"I’m treating it naturally and doing really well," she said at the time.

Newton-John was previously diagnosed with breast cancer 25 years ago in 1992, after finding a lump on her right breast.

The 'Psychical' hitmaker - who has a daughter Chloe with her ex-husband Matt Lattanzi - underwent a partial mastectomy and six months of treatment, before getting the all-clear.

However, there was more heartache for the star when she was diagnosed with cancer in her shoulder in 2013 after she was involved in a minor car accident.