Olivia Newton-John at The G'Day USA Australia.com Black Tie Gala held at Grand Ballroom, Hollywood and Highland. Los Angeles, California - 19.01.08

The Grease star is embarking on a 21-day, 228-kilometre (141-mile) trip - dubbed the Great Walk To Beijing - across the Great Wall Of China to raise funds for the Wellness Centre at the Austin Hospital in Melbourne, Australia.

And Newton-John will be joined along the way by a host of stars, including Australian compatriots Delta Goodrem, Peter Andre and Dannii Minogue.

Newton-John says, "I think it is going to be mind-blowingly exciting to see the place and to know that we are doing something that we will never do in a lifetime again. This is a lifetime experience."

The Great Walk To Beijing will commence on 7 April (08).

Source: WENN