Olivia Newton-John will walk along the Great Wall of China starting on April 7 to raise money for a cancer charity. The full distance is 228 kilometers (141 miles) and the walk is expected to take 21 days and be completed in Beijing. Newton-John lived through breast cancer in the 1990s. She is donating her proceeds to a cancer research facility in Melbourne, Australia, her hometown. Newton-John scored seven Top 10 country hits in the 1970s and was named the CMA female vocalist of the year in 1974.