Olivia Newton-John on Reports That Her Long-Missing Boyfriend Faked His Death: 'Nobody Knows What Really Happe

Olivia Newton-John is refusing to believe tabloid reports that her ex-boyfriend, Patrick McDermott, faked his own death and is now living in Mexico in order to avoid paying debts.

McDermott went missing in 2005 after going on an overnight fishing trip in San Pedro, California. The Coast Guard declared McDermott had "most likely drowned," but in March, two private investigators alleged to Woman's Day that McDermott is actually living and working in a remote area of Mexico.

"It was very hard, he was lost at sea and nobody really knows what happened," Newton-John, 68, tells Australia's 60 Minutes in a new interview when asked about all the speculation.

WATCH: Why Olivia Newton-John Almost Stopped Singing

The Grease actress admits she still thinks about the circumstances of McDermott's disappearance. Newton-John dated the cameraman on and off for nine years, following her divorce from Matt Lattanzi in 1995.

"It's human to wonder," she says. "But you know, those are the things in life you have to accept and let go. Because whenever you go through difficult times, there's always those concerns."

"But, I live on," she adds. "And of course questions come up, always, it's human."

Newton-John eventually remarried in 2008, when she tied the knot with John Easterling, founder and president of natural remedy firm, Amazon Herb Company.

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ET talked to the Australian superstar last October, when she scored a hit with "You Have to Believe," her first collaboration with her 30-year-old daughter, Chloe Lattanzi. The song is a reworking of her 1980 hit, "Magic," from the film Xanadu.

"I think she has amazing talent -- a beautiful voice, a great songwriter -- I've been chomping at the bit so everyone could see her," Newton-John gushed to ET about her only child. "It's a great opportunity for me to say, 'Yay! Chloe, go!' And to do one of my songs is a real special treat."

Watch below:

Olivia Newton-John Records Sexy Remake With Daughter Chloe

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