Stars are paying tribute
Actress and singer Olivia Newton-John has died from cancer aged 73.
The British-born Australian singer and actress was best known for playing Sandy in Grease.
She died peacefully at her California ranch surrounded by family and friends.
"Dame Olivia Newton-John passed away peacefully at her Ranch in Southern California this morning, surrounded by family and friends. We ask that everyone please respect the family's privacy during this very difficult time," her husband, John Easterling, wrote in a statement on the singer's verified Instagram account.
"Olivia has been a symbol of triumphs and hope for over 30 years sharing her journey with breast cancer."
Newton-John was first diagnosed with cancer in 1992 and went on to become a leading advocate for cancer research.
Her Grease co-star John Travolta said she "made all of our lives so much better" while its director said: "What you see is what you get with her."
Actress Stockard Channing - who played Rizzo in the smash hit movie musical - said: "I don't know if I've known a lovelier human being.
"Olivia was the essence of summer - her sunniness, her warmth and her grace are what always come to mind when I think of her. I will miss her enormously."
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