Australian actress and singer Olivia Newton-John, star of such films as "Grease" and "Xanadu", hit in the

1970s and 1980s, died on Monday morning (8) at her ranch in Southern California. She was 73 years old.

"Olivia has been a symbol of triumph and hope for over 30 years sharing her journey with breast cancer.

Her healing inspiration and pioneering experience with medicinal plants continues with the 

Olivia Newton-John Foundation Fund, dedicated to medicinal plant and cancer research. 

The family asks that any donations be made in her memory to the @onjfoundation,"

her husband, John Easterling, wrote in a statement on the actress' official Instagram account.

The singer revealed in September 2018 that she was treating cancer at the base of her spine.

It was her third cancer diagnosis, following bouts of breast cancer in the early 1990s and in 2017.