Producer: Johan Carlsson - Artist: Katy Perry - Vocal Producer: Peter Karlsson - Mix Engineer: John Hanes - Mixer: Serban Ghenea - Vocalist: Katy Perry - Cello: David Bukovinszky - Piano: Johan Carlsson - Programming: Johan Carlsson - Strings: Mattias Bylund - Violin: Mattias Johansson - Programming: Rami - Engineer: Cory Bice - Engineer: Jeremy Lertola - Engineer: Sam Holland - String Arranger: Mattias Bylund - A&R Admin: Liz Isik - Mastering Engineer: Dave Kutch - Composer/Author: Johan Carlsson