Mount Sims, born Matthew Sims in Milwaukee, Wisconsin, United States, is an American DJ, performance artist, and producer. He began his career performing in groups including the alternative rock band Citizen King, whose 1999 single “Better Days (And the Bottom Drops Out)” reached number 25 on the US Billboard Hot 100 chart. Relocating to Los Angeles to pursue a solo career as an electronic music act, he released his debut concept studio album, UltraSex, in 2002 through International DeeJay Gigolo Records and Emperor Norton Records. He released his second studio album, Wild Light, in 2005, incorporating post-punk and dark wave influences, followed by his third studio album, Happily Ever After, in 2008. In 2010, he collaborated alongside The Knife and Planningtorock on the electronic opera studio album Tomorrow, In a Year, and contributed vocals to Leila's studio album U&I in 2012.
