(Easy Piano Personality). Easy piano arrangements of all 12 tracks from Katy Perry's smash album: California Gurls * Circle the Drain * E. T. * Firework * Hummingbird Heartbeat * Last Friday Night (T. G.I. F.) * Not like the Movies * The One That Got Away * Peacock * Pearl * Teenage Dream * Who Am I Living For?. | Katy Perry - Teenage Dream, Paperback | Indigo Chapters