Grammy Award-winning singer and actress Olivia Newton-John has passed away at the age of 73 years old. Olivia rose to fame in the ’70s for her role as Sandy in the movie ‘Grease.’ Her husband, John Easterling, confirmed her passing on Instagram in a statement. He wrote, “Dame Olivia Newton-John (73) passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends. We ask that…