"Roar" by Katy Perry, is from her fourth studio album, Prism (2013). It was released as the lead single from 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.
https://en.wikipedia.org/wiki/Roar_(song)
https://en.wikipedia.org/wiki/Prism_(album)
https://en.wikipedia.org/wiki/Katy_Perry
https://en.wikipedia.org/wiki/Roar_(song)
https://en.wikipedia.org/wiki/Prism_(album)
https://en.wikipedia.org/wiki/Katy_Perry