Music Downloads Not Rated by the ESRB. Share the power of dance and download all-new moves from "Roar" by Katy Perry! Written by B McKee, L Gottwald, H Walter, M Martin & K Perry. ©2013 WB Music Corp(ASCAP), When I'm Rich You'll Be My B****(ASCAP)/Prescription Songs LLC, Kasz Money Publishing, Dream Machine Corp & MXM Music AB. Admin by Kobalt Music Publishing America Inc/Downtown DMP Songs(BMI) obo Songs of Pulse Recording(BMI). All rights reserved Courtesy of Capitol Records under license from Universal Music Ent.