The world mourns the loss of Olivia Newton-John, the beloved actress and singer-songwriter, who passed away peacefully at the age of 73. Her passing was confirmed by her husband, John Easterling, in a statement released on her social media accounts.Newton-John's iconic role in the musical film "Grease" cemented her place in entertainment history, and her impact on the industry will forever be remembered.Let's watch the video to see the touching tribute from her "Grease" co-star John Travolta and learn more about the life and career of this legendary performer.