'Grease' superstar was 'a symbol of triumphs and hope for over 30 years'
                                
                                
                                    (Newser) -
                                    Farewell, Sandy. Olivia Newton-John, one of the world's biggest superstars in the '70s and '80s, died Monday, her husband says. She was 73. Newton-John "passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends," John Easterling said in a...