Mats Söderlund (born 25 July 1967, Sweden) is a Swedish musician, best known under his stage name Günther.
Gunther's 2004 smash hit "Ding Dong Song" brought him country-wide recognition in his homeland, Sweden. The campy, silly, and titillating track, "Ding Dong Song" topped the Swedish charts the year of its release thanks to an inescapable hook and a sexually charged video featuring Günther's backup singers, the Sunshine Girls. A year later the campy phenomenon spread across Europe as indie rockers Franz Ferdinand were heard performing the song acoustically on Dutch radio. In 2006, his song "Like Fire Tonight" was accepted into Melodifestivalen, a Swedish music competition. However, Günther and the Sunshine Girls finished sixth in the semi-final round and did not make the finals.
Günther announced on his website that he is currently working on a new album with the working title Dirty Man Swedish Sex Beast. In 2011, the first single, "Pussycat", became available on Günther's web site.
Coming back from a hiatus, Günther released the single "I'm Not Justin Bieber, B*tch" on December 12, 2013.