The GREASE star has successfully beaten the disease herself - after being diagnosed in 1992 - so she knows how important peace and privacy are to Kylie's chances of recovery.
She says, "I just feel so badly for her because it's the very time you need to respect someone's privacy and leave them alone. It was a similar experience for me. I was about to go on tour (to the US) when I discovered I had cancer, so the similarities are very alike.
"The paparazzi weren't quite as crazy 13 years ago as they are now. But I just think that there is a time and a place for everything and this is not the time to be hanging at her house - you need to leave her alone."
Newton-John - who is currently raising money for the Olivia Newton-John Cancer Centre Appeal - adds how Kylie's cancer proves it can affect women of all ages.
She says, "It's a wake-up call for women that we need to self-examine on a regular basis and there is no age limit
"Early detection is key for a good diagnosis and I think a lot of women get scared to self-examine because they are scared they'll find something - but really, the obvious thing is to get into the habit from a very young age."19/05/2005 17:36
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