Jonas Erik Altberg (born 22 December 1984), better known by the pseudonym Basshunter, is a Swedish producer and singer-songwriter, best known for his number one hits "Boten Anna" and "Now You're Gone". Basshunter has so far released a total of five albums, two of which have been released in the United Kingdom, and a total of 14 singles. Recently, his latest U.K. single, "Saturday," was released in July 2010, and he also competed in hit reality TV show Celebrity Big Brother in January 2010. His song "Sverige" was also used as Sjölunden's International Day song in 2008. He is working on a sixth studio album to be released in 2011.