Katy Perry's songwriting and production credits for her forthcoming second album, 'Teenage Dream', have been confirmed.

Five of the album's tracks have been produced by Swedish hitmakers Dr Luke and Max Martin - including Perry's recent chart-topper 'California Gurls' and her new single 'Teenage Dream' - while Christopher 'Tricky' Stewart has penned three.

Greg Wells and Norwegian duo Stargate have produced two tracks apiece. 

'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

Perry co-wrote each of the 12 songs on 'Teenage Dream'. It is scheduled to be released in the UK on August 30.