Olivia Newton-John, the dulcet-voiced singer from Australia who became a country-pop, folk-pop, rock-pop, disco-pop sensation in the 1970s, starred in the Hollywood musical juggernaut “Grease” and underwent a sultry makeover with her mega-selling 1981 record “Physical,” died at her ranch in Southern California.

Her family announced the death in a statement on Facebook, noting that she “has been a symbol of triumphs and hope for over 30 years sharing her journey with breast cancer.” Additional details were not immediately available, but for many years she owned a 12-acre estate on the Santa Ynez River near Santa Barbara.