Additional information
Personnel: Katy Perry (vocals, whistling, piano); Greg Wells (guitar, piano); Dave Katz (guitar, programming); Dave Stewart , Max Martin , Scott Cutler, Sean Gould (guitar); Daniel Chase (keyboards, programming); Benny Blanco (drums, programming); Darren Dodd, Steven Wolf (drums); Jeff Bova, Sam Hollander, Ned Douglas (programming); Cathy Dennis (background vocals). Audio Mixers: Joe Zook; John Hanes . Recording information: Aerowave Studio, Encino, CA; Butch's Old House, Los Feliz, CA; Caopitol Studios, Los Angeles, CA; Conway Recording Studio, Hollywood, CA; Deathstar Studios; Dr. Luke's, New York, NY; Freshkills, New York, NY; Guillham's Farm Haslemere, Surrey, England; Legacy Recording Studio, NY, NY; Monster Island, New York, NY; Rocket Carousel Studio, Los Angeles, CA; Rondor Studios, Los Angeles, CA; The Compound, Los Angeles, CA; UMPG Studio, Los Angeles, CA; Unstable Studios. Illustrator: Shayne Ivy. Photographer: Michael Elins.
