| Charli XCX - vocals, executive production Noonie Bao - additional vocals (tracks 4, 7, 14)
 Rostam Batmanglij - production (track 14)
 Patrik Berger - instruments, programming (tracks 4, 5, 8, 12); production (tracks 4-6, 8, 12); backing vocals, engineering (track 12)
 Benny Blanco - instruments, production (tracks 11, 13); programming (track 13)
 Julian Burg - additional engineering (track 9)
 Cashmere Cat - additional programming (track 2); production (tracks 2, 15); instruments, programming (track 15)
 Shags Chamberlain - backing vocals, bass (track 3)
 Sarah Chernoff - backing vocals (track 14)
 Keefus Ciancia - additional keyboards (track 5)
 Angel Deradoorian - backing vocals (track 14)
 Mikkel S. Eriksen - instruments, programming, recording (track 15)
 Frank Fieber - design, layout
 Harry Fieber - illustration
 Stefan Graslund - additional production (track 5); production (track 6)
 Josh Gudwin - production, recording (Rita Ora's vocals) (track 7)
 Stuart Hawkes - mastering
 Tor Erik Hermansen - instruments, programming (track 15)
 John Hill - co-production (track 4); production (track 5)
 Bella Howard - photography
 Ed Howard - A&R
 Kirstin Hume - additional girl vocals (track 2)
 Seif "Mageef" Hussain - production coordination (tracks 11, 13)
 Jerry James - drum programming, production (track 1); bass, engineering (tracks 1, 3); backing vocals (track 3)
 Chris Kasych - engineering (track 5)
 Markus Krunegard - additional vocals (track 4); backing vocals, instruments, programming (track 12)
 Greg Kurstin - bass, engineering, guitar, keyboards, production (track 9)
 Tony Lake - additional engineering (tracks 1, 2, 4, 6, 7, 12, 14)
 Caleb Laven - vocal editing (tracks 1, 3)
 Chris Laws - drums, engineering (track 2)
 Katie Littlewood - additional girl vocals (track 2)
 Andrew "McMuffin" Luftman - production coordination (tracks 11, 13)
 Steve Mac - keyboards, production (track 2)
 Macy McCutcheon - additional girl vocals (track 2)
 John Morrical - engineering (track 4)
 Mr. Rogers - bass, drums, engineering, production, programming (track 7)
 Naughty Boy - instruments, production (track 11)
 Remi Nicole - additional vocals (track 3); backing vocals (track 4)
 Dano "Robopop" Omelio - guitar (track 2)
 Rita Ora - vocals (track 7)
 Rob Orton - mixing (tracks 1, 2, 4, 6, 7, 12, 14)
 Alex Pasco - additional engineering (track 9)
 Steve Pearce - bass (track 2)
 Ariel Pink - backing vocals, mouth organ, synthesiser (track 3)
 Daniel Pursey - engineering, percussion (track 2)
 Justin L. Raisen - backing vocals, synthesiser (tracks 1, 3); drum programming, engineering, guitar, production (tracks 1, 3, 10); OP-1 (track 10)
 Ariel Rechtshaid - production, programming (track 7)
 Aaron Redfield - drums (track 9)
 Bea Rexstrew - additional girl vocals (track 2)
 Daniela Rivera - additional engineering for mix (track 15)
 Nick Rowe - vocal editing (track 10)
 Dave Schiffman - mixing (tracks 3, 8, 10)
 Chris "Anger Management" Sclafani - engineering (tracks 11, 13)
 Lars Skoglund - drums (track 12)
 Stargate - production (tracks 2, 15)
 Mark "Spike" Stent - mixing (tracks 5, 9, 11, 13)
 Martin Stilling - engineering, instruments, programming (track 12)
 Geoff Swan - mixing assistance (tracks 5, 9, 11, 13)
 Phil Tan - mixing (track 15)
 Miles Walker - recording (track 15)
 Andrew Wyatt  backing vocals (tracks 12, 14)
 Young & Sick - instruments, production, programming (track 13)
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