Olivia Newton-John was a multi-talented British-Australian singer, actress, and activist, best known for her musical career and iconic role in the film "Grease." Starting her career in the late 1960s, she became an international star with hits like "Physical" and "I Honestly Love You." Her soothing voice and appealing stage presence won her multiple Grammy Awards and solidified her status in the entertainment industry. In addition to her success in music, Newton-John starred in...