After his father's death, he moved to live with his mother and half sister, singer Zindy Laursen to Åbyhøj, Aarhus, where he grew up.
His big breakthrough came in 2004 with the release of his joint self-titled EP Johnson & Malone with childhood friend Ralle Malone on the Run for Cover label with producer Pilfinger from Glamour Hotel Music In 2005, he built up on his success as a part of the group J.A.Z., that consisted of Marc Johnson, his sister Zindy Laursen and of Alex Ambrose.
Johnson's first solo album was released on 29 May 2006 entitled Det passer produced by Pilfinger.
Johnson notably contributed to the collaborative single "Hey Shorty" that appeared in Thomas Kato's album Discolized.
In 2010 Johnson was also involved in the Danish television program AllStars where he represents his home town of Aarhus.