KATY Perry’s new song makes her feel strong! The 28-year-old US singer wrote this song for herself. It shows how Perry stands up and discovers power for herself. “Roar is a song about being able to finally speak up for yourself,” Perry told the UK’s Radio 1 DJ Scott Mills. This single was released on Aug 13. It became No 1 on the iTunes download chart (排行榜) within 24 hours. How powerful is that!