Producer, Associated Performer, Background Vocalist, Bass Guitar, Acoustic Guitar, Drums, Percussion, Keyboards, Programmer: Shellback Producer, Programmer, Associated Performer, Keyboards, Piano: Max Martin Producer, Associated Performer, Background Vocalist, Studio Personnel, Recording Engineer, Programmer: ILYA Associated Performer, Background Vocalist, Vocals: Taylor Swift Associated Performer, Background Vocalist, Vocals: Kendrick Lamar Studio Personnel, Engineer: Peter Carlsson Studio Personnel, Recording Engineer: Michael Ilbert Studio Personnel, Recording Engineer: Sam Holland Studio Personnel, Asst. Recording Engineer: Cory Bice Studio Personnel, Asst. Recording Engineer: Ben Sedano Studio Personnel, Mastering Engineer: Tom Coyne Studio Personnel, Mixer: John Hanes Studio Personnel, Mix Engineer: Serban Ghenea Composer Lyricist: Taylor Swift Composer Lyricist: Kendrick Lamar Composer Lyricist: Max Martin Composer Lyricist: Shellback
