Artist: 5 Seconds of Summer - Vocals: Luke Hemmings - Vocals: Calum Hood - Featuring: Julia Michaels - Vocals: Michael Clifford - Vocals: Ashton Irwin - Vocals: Julia Michaels - Guitar: Luke Hemmings - Guitar: Michael Clifford - Bass Guitar: Calum Hood - Drums: Ashton Irwin - Background Vocalist: Luke Hemmings - Background Vocalist: Calum Hood - Background Vocalist: Ashton Irwin - Background Vocalist: Michael Clifford - Background Vocalist: Julia Michaels - Background Vocalist: Andrew Watt - Background Vocalist: Ali Tamposi - Programming: Andrew Watt - Guitar: Andrew Watt - Keyboards: Andrew Watt - Producer: Andrew Watt - String Arranger: Andrew Watt - String Arranger: Rosie Danvers - Engineer: Andrew Watt - Engineer: Nick Taylor - Engineer: Tommy D - Engineer: David Rodriguez - Engineer: Ben Rice - Engineer: Paul Lamalfa - Recording Engineer: Ben Rice - Mixer: Serban Ghenea - Engineer: John Hanes - Mastering Engineer: Chris Gehringer - Violin: Patrick Kiernan - Violin: Jenny Sacha - Violin: Hayley Pomfrett - Violin: Sarah Sexton - Violin: Debbie Widdup - Violin: Natalia Bonner - Violin: Sally Jackson - Violin: Eleanor Mathieson - Viola: Emma Owens - Viola: Meghan Cassidy - Cello: Rosie Danvers - Cello: Jane Oliver - Double Bass: Richard Price - Composer/Author: Andrew Watt