Olivia Newton-John has died at the age of 73. According to a post on her official Facebook page, the "Grease" actress died "peacefully at her Ranch in Southern California" Monday morning. A cause of ...

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 ...