Shellback (producer)

Karl Johan Schuster (born February 1, 1985^[source?]), better known by his stage name Shellback, is a songwriter, record producer and musician from Karlshamn, a small town in Southern Sweden.^[1] Together with Max Martin, he wrote "So What" and "Raise Your Glass" by Pink, "If U Seek Amy" and "3" by Britney Spears, "DJ Got Us Fallin' in Love" by Usher featuring Pitbull, and "Whataya Want from Me" by Adam Lambert. Also with Martin he co-wrote the Maroon 5 single One More Night.

Shellback
Shellback in 2015.
Background information
Birth name	Karl Johan Schuster
Born	(1985-02-01) February 1, 1985 (age 40)
Origin	Karlshamn, Sweden
Occupation(s)	Songwriter, record producer, musician
Years active	2006–present