Katzenjammer is a folk group from Norway. Mixing a variety of musical styles with multi-instrumentalism, the band consists of Anne Marit Bergheim, Solveig Heilo, Marianne Sveen and Turid Jørgensen. Most of their material is written by their friend Mats Rybø; however, the band also contribute songs written by themselves. The band is easily recognizable by their signature custom Balalaika bass with the face of a cat painted on it, echoing the true meaning of the band's name: "Katzenjammer" is a German word for "cat's wail" (and also a dated term for "hangover.")