73-year-old reportedly died in the early hours of this morning peacefully at her ranch in Southern California.Watch Below: Bert Newton surprises Olivia Newton-John dressed as John TravoltaHer husband John Easterling, confirmed the news in a post to social media, saying that Olivia was "a symbol of triumphs and hope"."Dame Olivia Newton-John (73) passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends. We ask that everyone please respect the family's privacy during this very difficult time," Olivia's husband wrote."Olivia has been a symbol of triumphs and hope for over 30 years sharing her journey with breast cancer."Her healing inspiration and pioneering experience with plant medicine continues with the Olivia Newton-John Foundation Fund, dedicated to researching plant medicine and cancer."In lieu of flowers, the family asks that any donations be made in her memory to the @onjfoundation."Olivia also leaves behind her 34-year-old daughter Chloe Lattanzi.Newton-John has had a long battle with cancer, having first been diagnosed with breast cancer in 1992.