To oni odpowiadają za dwanaście piosenek, które trafią na drugi solowy album Katy Perry.
Oto pełna lista tzw. „creditsów”:
`Teenage Dream`
Written by Katy Perry, Lukasz Gottwald, Benjamin Levin, Bonnie McKee and Max Martin
Produced by Benny Blanco, Dr Luke and Max Martin
`Last Friday Night`
Written by Katy Perry, Lukasz Gottwald, Bonnie McKee and Max Martin
Produced by Dr Luke and Max Martin
`California Gurls` featuring Snoop Dogg
Written by Katy Perry, Lukasz Gottwald, Benjamin Levin, Bonnie McKee, Max Martin and Calvin Broadus
Produced by Benny Blanco, Dr Luke and Max Martin
`Firework`
Written by Katy Perry, Mikkel Eriksen, Tor Erik Hermansen, Sandy Wilhelm and Ester Dean
Produced by Stargate and Sandy Vee
`Peacock`
Written by Katy Perry, Mikkel Eriksen, Tor Erik Hermansen and Ester Dean
Produced by Stargate
`Circle The Drain`
Written by Katy Perry, Christopher `Tricky` Stewart and Monte Neuble
Produced by Christopher `Tricky` Stewart
`The One That Got Away`
Written by Katy Perry, Lukasz Gottwald and Max Martin
Produced by Dr Luke and Max Martin
`E.T.`
Written by Katy Perry, Lukasz Gottwald, Max Martin and Joshua Coleman
Produced by Dr Luke and Max Martin
`Who Am I Living For?`
Written by Katy Perry, Christopher `Tricky` Stewart, Monte Neuble and Brian Thomas
Produced by Christopher `Tricky` Stewart
`Pearl`
Written by Katy Perry, Greg Wells and Christopher `Tricky` Stewart
Produced by Greg Wells
`Hummingbird Heartbeat`
Written by Katy Perry, Christopher `Tricky` Stewart, Stacy Barthe and Monte Neuble
Produced by Christopher `Tricky` Stewart
`Not Like In The Movies`
Written by Katy Perry and Greg Wells
Produced by Greg Wells
