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Mattmanrobin

Mattman & Robin is a Swedish songwriting and production duo composed of Mattias Larsson and Robin Fredriksson. Their writing and prducing credits include collaborations with the major artists such as Taylor Swift, Selena Gomez, Carly Rae Jepsen, Gwen Stefani, Nick Jonas, Britney Spears, Tove Lo and Ellie Goulding.

Relation with Hailee Steinfeld