Olivia Newton-John's daughter Chloe Lattanzi was forced to quit Instagram after users allegedly left "incredibly insensitive" comments on her account about her mother's cancer returning.
Newton-John announced earlier this week she had been diagnosed with breast cancer for the second time, 20 years after she first beat the disease.
Lattanzi took to Instagram yesterday to post an emotional tribute to her mum alongside a throwback picture of the two of them, reports News.com.au.
"I want to thank all of you for your love and support. My mum and best friend is going to be fine!" the 31-year-old wrote.
"Cancer is the disease of our generation and it is part of my and my mothers quest to beat this insidious monster. We both love you all, and anyone fighting this disease you can beat it.