Christensen started in 1991 as a music producer and DJ, and had his first success in 1991 with the
U96 single "
Das Boot". In several countries, this track was the first techno song to reach the number one position. Since 2002, Christensen also works under the name Alex C. and frequently collaborates with
Yasmin K., whom he met as a judge on the second season of
Popstars. As a producer and composer, Christensen has worked for artists such as
Right Said Fred,
Marky Mark,
Tom Jones,
*NSYNC,
Rollergirl,
Marianne Rosenberg,
Sarah Brightman, and
ATC. Christensen represented Germany in the final of the
2009 Eurovision Song Contest in
Moscow, together with
Oscar Loya, under the name Alex Swings Oscar Sings, performing the song "
Miss Kiss Kiss Bang", finishing in 20th place. Christensen's song "Doktorspiele", which included additional vocals by
Y-ass, won the 2008 Eurodanceweb Contest, determined by points assigned by a professional jury of disc jockeys, journalists, music producers, webmasters, and radio speakers from all over the world. One of the songs produced by Christensen, ATC's "
Around the World (La La La La La)", was later sampled in Beat Ink's "Around the World" in 2008 and used in
Chris Webby's "La La La" in 2009. In 2007, Christensen released the song "
Du hast den schönsten Arsch der Welt" in co-operation with Y-ass. It sampled The Soundlovers' "Run Away". This song marked an international breakthrough for Christensen and it was re-released in several other languages. In some countries, the melody was adjusted to local preferences.
Jasper Forks (2010–present) In early 2010, Christensen adopted the name Jasper Forks to mark a move away from the dance productions he had previously been associated with. He began producing tech piano house, and his first single, "River Flows in You", made it to the top 10 of the airplay charts all across Europe. The track is composed by Korean pianist
Yiruma. His follow-up single, "Alone", was released in January 2011. In 2013, he released "J'aime Le Diable". ==Personal life==