The term 'KATY PERRY HIT SONG' can be summarized by the four-letter solution 'ROAR'. This is a song by American singer Katy Perry, released in 2013 as the lead single from her fourth studio album, Prism. The song was written by Perry, Bonnie McKee, Lukasz Gottwald, Max Martin, and Henry Walter, and produced by Dr. Luke, Max Martin, and Cirkut. It is an uptempo pop rock and dance-pop song with elements of arena rock. The song's lyrics speak about self-empowerment and standing up for oneself.