Dame Olivia Newton-John was a British-Australian singer and actress, renowned for her gentle voice, purity of tone, and her iconic role in the film Grease. She sold over 100 million records, making her one of the best-selling music artists of all time and the highest-selling female Australian recording artist. Beyond her musical and acting career, she was a dedicated activist for environmental and animal rights causes, and a strong advocate for breast cancer research and awareness, having battled the disease herself.