Olivia Newton-John, the actress and singer who starred in the classic 1978 film "Grease" has died. Newton-John, a longtime resident of Australia whose sales topped 100 million albums, died Monday at her southern California ranch, her husband, John Easterling, wrote on Instagram. In this file photo, Newton-John appears on the set of "Grease," in Los Angeles on Aug. 30, 1977. 📸: Nick Ut / Associated Press