Olivia Newton-John has passed away at the age of 73.

The singer died at a ranch in Southern California surrounded by family and friends.

Her husband released a statement asking for “privacy during this very difficult time”.

The family requests that “in lieu of flowers … any donations be made in her memory to the Olivia Newton-John Foundation Fund.”

The four-time Grammy award winner is best known for her role as Sandy in the movie Grease.

Image: Getty/Cole Bennetts