[4] Altberg began producing music at the age of 17 after six months of using the software program FruityLoops (FL Studio).

[12] His father was tired of hearing the constant pounding when Basshunter was producing music inside the bedroom, so he built him a clubhouse.

[19] Basshunter published his music mainly through the Internet for free download on platforms such as chat channels and gaming websites.

[21] In March 2006, Basshunter published his song "Boten Anna" online[22] and within twenty-four hours, it had been downloaded 37,000 times.

[26] It also reached number one on the Danish singles chart, staying there for 14 weeks,[27] and was certified triple platinum[28] for selling 61,000 copies.

[35] An American version of LOL was released on 1 January 2008, with the same Swedish songs as the original album but with lyrics and some titles translated into English.

[41] The second single from LOL, "Vi sitter i Ventrilo och spelar DotA", was released on 13 September of the same year.

[18] A year earlier, in 2006, DJ Mental Theo (under the alias Bazzheadz) had created a bootleg English version called Now You're Gone using the melody of "Boten Anna" with entirely different lyrics.

[57] Initially, Basshunter tried to translate "Boten Anna" into English[12] but found it difficult to keep the "hock" and the story[58] so he recorded his own version of "Now You're Gone" with DJ Mental Theo's lyrics.

[70] The third single "All I Ever Wanted" was released on 29 June 2008[71] and peaked at number 2 in the United Kingdom,[51] where it sold about 400,000 copies[72] and was certified gold.

[82] In 2008 Basshunter became the 11th-best-selling singles songwriter in the United Kingdom according to eight months of data compiled by Official Charts Company.

[74] On 20 April 2011, the next Basshunter single "Fest i hela huset",[101] which was recorded during his time in the Swedish Big Brother series, was released.

[122] Since then, he has released five more singles: "Home" (2019),[123] "Angels Ain't Listening" (2020)[124] and "Life Speaks to Me" (2021); a tribute to Avicii.

[129][b] He says it is cheerful, full of energy and very melodic, stating it does not sound like other types of music, and that producers and artists display their own identities in their works.

[12] He always takes his laptop on concert tours so he can spontaneously record ideas and return to them when he is back in his main studio.

He added that it is more important than ever to adapt and an artist has to create something that people haven't heard before and described it as a holy grail.

[177] He appeared on BBC Switch Live (2008)[178] and in 2014 performed on Sochi Medals Plaza during the awards ceremony of Winter Olympic Games.

In 2007 he released some remixes of singles; "Dancing Lasha Tumbai" by Verka Serduchka[185] finished second in the Eurovision Song Contest 2007.

[186] "Du hast den schönsten Arsch der Welt" by Alex C. (featuring Y-ass) charted at number one in Austria[187] and Germany.

[200] Music videos for "Now You're Gone", "All I Ever Wanted", "Angel in the Night", "I Miss You", "Every Morning", "I Promised Myself", "Saturday" and "Northern Light" were directed by Alex Herron.

[212] Starting in 2010, Basshunter took part in the seventh series of British Channel 4's Celebrity Big Brother as a housemate and finished in fourth place.

[217] In a 2017 Twitter poll, 92% of 57,814 voters said they would like Basshunter to become Prime Minister of the United Kingdom; 8% supported Theresa May.

[221] After achieving commercial success, he could not publish songs as free downloads and started producing vlogs[58] for YouTube.

[155] He initially planned to release a continuation of LOL album titled either ROFL or KTHXBYE for free but was unable to after signing with a record label.

[225] On 10 December 2010, Scotland's Fife Constabulary charged Basshunter over a sexual assault allegation made by two female fans during a party at a nightclub in Kirkcaldy.

[226] Basshunter pleaded not guilty to two charges of sexual assault against the two women at a hearing at the town's court on 12 January 2011.

[227] On 14 June 2011, he was found not guilty, with the sheriff describing his accusers as "neither credible nor reliable" and their testimony as "riddled with inconsistencies and improbabilities".

[228] During their time together on the British reality television show Celebrity Big Brother in 2010, Basshunter and Kazakhstani-born Russian model Ekaterina Ivanova began an intimate relationship.

[229] He began dating Tina Makhia Khayatsadeh in 2014, and they were married on 19 January 2017 at the Dubai Polo & Equestrian Club in the presence of his brother Joakim, his manager Henrik Uhlmann, Iranian-Swedish singer Arash, Polish singer Margaret, Swedish diplomat Jan Thesleff, Warner Music Sweden chief executive officer Jonas Siljemark.

[235] His debut album LOL was nominated for Emma,[236] Grammis[237] and won the European Border Breakers Award.