The Australian singer became one of the biggest pop stars of the ’70s and charmed generations of viewers in the blockbuster movie ‘Grease’

Olivia Newton-John, the Australian singer whose breathy voice and wholesome beauty made her one of the biggest pop stars of the ’70s and charmed generations of viewers in the blockbuster movie “Grease,” died on Monday, according to a statement from her husband. She was 73.