Most of Martinus Gunnarsen’s net worth is sourced from his songs, brand collaboration, concerts, and more. As of 2023, Martinus Gunnarsen’s net worth would be around $3 million. Martinus Gunnarsen Career. As professional artists, Martinus Gunnarsen and his brother Marcus participated in the Melodi Grand Prix Junior when they were just 10 Marcus and Martinus Gunnarsen in a selfie in December 2017 (M&M / Instagram) Martinus Gunnarsen Facts. He wrote his first song at the age of 9. Martinus creates music on his Mac but says his home studio is even better. He follows football religiously and supports Chelsea. He can play the piano a little bit. UC9u5h.

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