Image copyright Getty Images Image caption Newton-John also enjoyed a pop career

Olivia Newton-John has scotched speculation over her health and told fans "rumours of my death have been greatly exaggerated".

The Australian Grease star revealed in September she had been diagnosed with cancer for a third time.

Reports recently emerged in the US and Australia speculating that she had only weeks to live.

Newton-John, 70, has now assured fans in a video released on Twitter that she is "doing great".

Fellow Grease star, Didi Conn - who played Frenchie in the hit film - told ITV's Lorraine show: "She's laying a little low. But... she's full of life.

Image copyright Getty Images Image caption Didi Conn will be hitting the screens in her ice skates later this month

"When she signs her letters it's always, 'With love and light', and when she performs she reaches out. The last song she always sings is I Honestly Love You to her fans and she really does."

Conn, who will compete in this year's Dancing On Ice, said: "She's well. When she took some time off she said: 'I'm going to be back in six months.' It wasn't even six months. It was four-and-a-half months."

In September last year, Newton-John revealed she had been diagnosed with cancer for the third time in three decades, telling Australian news programme Sunday Night that doctors had found a tumour in her lower back in 2017 (stage four breast cancer that has spread to the spine).

Image copyright Getty Images Image caption Newton-John had a big hit in 1981 with her song Physical

She said she believed she would "win over it" and was now using medicinal marijuana and other natural remedies alongside radiation therapy.

After surviving her initial cancer diagnosis in 1992, Newton-John became a prominent campaigner, setting up the Olivia Newton-John Cancer and Wellness research centre in Melbourne.

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