"Roar" is a song by American singer Katy Perry for her fourth studio album, Prism (2013). It was released as the lead singlefrom the record on August 10, 2013. The song was written by Perry, Bonnie McKee, Dr. Luke, Max Martin, and Cirkut, and produced by the latter three. It is a power pop song, containing elements of glam rock and arena rock, with lyrics centering on standing up for oneself and self-empowerment."Roar" received generally mixed reviews from music critics; many appreciated its overall production, while others felt that its lyrical content contained "clichés". The song was a commercial success, becoming Perry's eighth non-consecutive number one song on the U.S. Billboard Hot 100, and also topping charts in Australia, Canada, Ireland, New Zealand, and the United Kingdom. Additionally, it also reached the top five in most international charts, including France, Germany, Italy, Japan and Switzerland.