Jonas Erik Altberg (Swedish pronunciation: [ˈjûːnas ˈêːrɪk ˈâltbærj]; born 22 December 1984), known professionally as Basshunter, is a Swedish singer, record producer, songwriter and DJ. As indicated by his stage name, Basshunter is known for bass-heavy eurodance, trance, and electronic pop music.

Born and raised in Halmstad he moved to Malmö in 2006. As a young teen, Basshunter sang in a choir his mother ran. He started producing music at the age of 17, and later he started performing in local venues in his early career. In 2006, he self-released "Boten Anna" for free download a few months before he signed with labels Extensive Music and Warner Music Sweden and began commercial releases. His 2007 song "Now You're Gone" featuring Bazzheadz is based on Bazzheadz's "Now You're Gone" which uses the melody of "Boten Anna" with entirely different lyrics.

Basshunter has recorded five studio albums: The Bassmachine (2004), LOL (2006), Now You're Gone – The Album (2008), Bass Generation (2009), and Calling Time (2013). In addition to his own music, he has written for El Capon, Mange Makers, and Lana Scolaro. He has taken part in the seventh series of the British reality television show Celebrity Big Brother, episodes of the Swedish game show Fångarna på fortet, and an episode of the British television quiz show Weakest Link.

His accolades include a European Border Breakers Award, a Musikförläggarnas pris, a Telia award, and nominations for a BT Digital Music Award, two Grammis, an MTV Europe Music Award, and a Rockbjörnen. According to Svenska Dagbladet figures published in 2009, he has sold more than 3 million records.