Artist: Katy Perry - Vocals: Katy Perry - Programming: Greg Wells - Bass: Greg Wells - Piano: Greg Wells - Producer: Greg Wells - Engineer: Drew Pearson - Mixer: Joe Zook - Horn Arranger: Jerry Hey - Horn: Jerry Hey - Horn: Gary Grant - Horn: Bill Reichenbach - Horn: Dan Higgins

Artist: Katy Perry - Vocals: Katy Perry - Piano: Greg Wells - Producer: Greg Wells - Bass: Greg Wells - Programming: Greg Wells - Engineer: Drew Pearson - Mixer: Joe Zook - Music Production: Junior Sanchez - Re-Mixer: Junior Sanchez - Horn Arranger: Jerry Hey - Horn: Jerry Hey - Horn: Gary Grant - Horn: Bill Reichenbach - Horn: Dan Higgins

Producer: Junior Sanchez - Artist: Katy Perry - Mixer: Junior Sanchez - Asst. Recording Engineer: Nick Nastasi - Asst. Recording Engineer: Josh Sadlier-Brown - Keyboards: Paul Sottile - Guitar: Chris Traynor - Producer: Ray Martin - Recording Engineer: Ray Martin - Mixer: Ray Martin

Producer: Greg Wells - Artist: Katy Perry