Translation: Piano.
Translation: Piano, Vocal. PVG. RHM. --.
Translation: Max Martin , Bonnie Leigh McKee , Katy Perry , Lukasz Gottwald , Henry Walter. Plan. Vocal. Chords. Solero.
Translation: Max Martin , Bonnie Leigh McKee , Katy Perry , Lukasz Gottwald , Henry Walter. WB Music Corp. Vocal. Chords.