which multiple Australian gold medalist won the 100m hurdles at the 2008 Summer Olympics?
Australia at the World Championships in Athletics:  Cathy Freeman, Jana Pittman and Sally Pearson are Australia's only multiple gold medal winners, Freeman (bronze) and Pearson (silver) have also each won a place medal. Sally Pearson:  She also won a silver medal in the 100 m hurdles at the 2008 Summer Olympics and the 2013 World Championships.
Sally Pearson