Actress and singer Olivia Newton-John has died at the age of 73. Her husband, John Easterling, announced via her official Facebook page that Olivia had passed away peacefully at her Southern California ranch in the early hours of Monday 8 Aug, after battling cancer on and off for 30 years.The statement read: "Dame Olivia Newton-John passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends.