Olivia Newton-John to Walk Great Wall of China

2/22/2008 Stephen L. Betts Olivia Newton-John will walk along the Great Wall of China starting on April 7 to raise money for a cancer charity, according to CMT.com. The full distance is 228 kilometers (141 miles) and the walk is expected to take 21 days and be completed in Beijing. Olivia survived breast cancer in the 1990s, and is donating her proceeds to a cancer research facility in Melbourne, Australia, her hometown. Olivia Newton-John scored seven Top 10 country hits in the 1970s and was named the CMA Female Vocalist of the Year in 1974.