When you have a cavity in your tooth and you let it get worse, eventually you have to get a root canal. If you have something that isn't right, the earlier you treat it the easier the treatment is going to be. That's kind of common sense.

Singing at the Opening Ceremonies of the Sydney Olympics in 2000 was amazing and, probably the highlight of this decade is the opening of the Olivia Newton-John Cancer and Wellness Centre in my hometown of Melbourne, Australia.

Live, love, knowing that we're all free Now that we are blessed in our country And realise how lucky we are

Nature is the most beautiful thing we have. It's better than art because it's from the creator.

As for highlights, of course "Grease" changed my life and I will always be grateful for that experience.

Man is taking over the forests and polluting the oceans, the animal species are threatened. I try to contribute as much as I can. We're really messing up our environment. I try to get people more aware of what's going on so that they can, even in a local way, try to prevent pollution to their lakes and rivers and prevent nuclear dumping in the oceans - it's bad enough that they're doing it in residential areas, but putting it in the ocean! Eventually it's going to pollute our food resources and, if the ocean dies, we're gone.

John Farrar, my dear friend and songwriter/producer of most of my hits (he wrote "You're The One That I Want" and "Hopelessly Devoted to You," among others), wrote the song ["I Think You Might Like It"] and it captures so much fun and joy! Having that reunion as well, with John and John - made the project even more special!