Olivia Newton-John on 2nd cancer battle: 'The pain level was really the hardest thing'

Singer is being treated for her second bout of breast cancer.

"I can walk, but I can't go long distances,” she told Australia's "60 Minutes." "But I'll get there, because I couldn't walk at all a month or so ago. As I heal I'll be able to walk more."

"The pain level was really the hardest thing," the "Grease" star told "60 Minutes." "I was trying to do shows and it was pretty agonizing."

Newton-John underwent a course of photon radiation therapy and other natural wellness treatments.

"I need to get through this," she said in the televised interview. "I have lots to do, but of course, it's scary. I'd be lying if I said it wasn't scary. It was, but I felt very sure that I would get through."

Today, the star remains optimistic.

"It's probably something I'll deal with the rest of my life," she said. "But I will and I'll be fine and there have been a lot of women, who have had reoccurrences, and continue on with their lives to be old ladies. That's my vision."