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Songwriters/Shellback
Shellback

Songwriter & Producer

Shellback

Swedish producer Karl Johan Schuster, known professionally as Shellback, is Max Martin's most frequent collaborator and right hand in the studio. Together they formed an unbeatable production team on 1989, Reputation, and The Life of a Showgirl. Shellback's contribution leans toward the rhythmic and the kinetic — the driving drums on 'Shake It Off,' the pulsing bass on 'Style,' the aggressive stomp of 'Bad Blood.' Where Martin focuses on melody, Shellback supplies the engine that makes the songs move.

Stats

Songs

23

Albums

4

Role

Writer/Prod

Songwriting Style

Driving pop-rock production. Kinetic rhythms, punchy drums, and aggressive sonic energy that gives pop songs a physical urgency.

Notable Collaborators

Taylor SwiftMax MartinMaroon 5P!nkEd Sheeran

Full Discography

1989
19892014
The Life of a Showgirl
The Life of a Showgirl2025

Albums

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