Madde Holmberg has 5 Marcus & Martinus concerts.

Marcus & Martinus (both born in 21 February 2002 in Elverum, Norway), are a Norwegian pop-duo consisting of twin brothers Marcus and Martinus Gunnarsen. In 2012 Marcus & Martinus were contestants on the eleventh season of Melodi Grand Prix Junior. It was held at the Oslo Spektrum in Oslo, Norway and was broadcast live by Norwegian Broadcasting Corporation (NRK), hosted by Margrethe Røed and Tooji. They won the contest with the song "To dråper vann" (English: "Two Drops of Water").