Olivia Newton-John, who played Sandy in ‘Grease,’ dies at 73

FILE - John Travolta, left, and Olivia Newton-John arrive at the The Penfolds Icon Gala Dinner in Los Angeles on Jan. 14, 2006. Travolta, who starred with Newton-John in "Grease," presented Newton-John with the "Lifetime Achievement award. Newton-John, a longtime resident of Australia whose sales topped 100 million albums, died Monday at her southern California ranch, John Easterling, her husband, wrote on Instagram and Facebook. She was 73. (AP Photo/Branimir Kvartuc, File)

FILE - Actress and singer Olivia Newton-John attends the 2018 G'Day USA Los Angeles Gala in Los Angeles on Jan. 27, 2018. Newton-John, a longtime resident of Australia whose sales topped 100 million albums, died Monday at her southern California ranch, John Easterling, her husband, wrote on Instagram and Facebook. She was 73. (Photo by Richard Shotwell/Invision/AP, File)

NEW YORK — Olivia Newton-John, the Grammy-winning superstar who reigned on pop, country, adult contemporary and dance charts with such hits as “Physical” and “You’re the One That I Want” and won countless hearts as everyone’s favorite Sandy in the blockbuster film version of “Grease,” has died. She was 73.