In 2005, Crazy Frog recorded “Axel F,” known to the internet as “the Crazy Frog song.” The novelty song is Crazy Frog’s first and most internationally successful single.

It is a cover of Harold Faltermeyer’s 1984 composition “Axel F,” produced by Matthias Wagner and Andreas Dohmeyer, the two members of Off-cast Project, and Henning Reith and Reinhard “DJ Voodoo” Raith, two members of the German dance production team Bass Bumpers. Wolfgang Boss and Jamster! arranged the remix, and later marketed it as a ringtone.