( PRS-affiliated), MXM Music AB, Warner/Chappell Music Scandinavia AB, Italians Do It Better (in 2017), MXM (in 2017), Pineapple Lasagne ( ASCAP-affiliated) (in 2017), Prescription Songs (in 2017), Unsub Pub LLC (in 2017), WB Music Corp. Programming and producer: Max Martin and Ali Payami assistant engineer: Cory Bice and Jeremy Lertola engineer: John Hanes ( audio engineer, mixer) and Sam Holland mixer: Serban Ghenea editor: Peter Karlsson bass, piano and synthesizer: Ali Payami percussion: Max Martin and Ali Payami background vocals: Katy Perry and Astrid S ( Norwegian singer-songwriter) lead vocals: Katy Perry recorded at: MXM Studios ( Stockholm) in Stockholm, Stockholms län, Sweden, MXM Studios in Los Angeles, California, United States and Wolf Cousins Studios in Stockholm, Stockholms län, Sweden mixed at: MixStar Studios in Virginia Beach, Virginia, United States recording of: Hey Hey Hey writer: Sarah Hudson, Max Martin, Ali Payami, Katy Perry and Sia Furler ( Australian singer-songwriter) publisher: EMI Music Publishing Ltd.

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