It was written by Alex Christensen, Jens Klein, Peter Könemann, and Clyde "J. Ena" "Ward and produced by the former for their debut studio album, Never Forget (Where You Come From) (2001).

The song was released as the band's debut single on 3 December 2001 following their formation on the RTL II reality television show Popstars – Du bist mein Traum.

It became the year's Christmas number one in Germany and spent five consecutive weeks at number one, achieving a double platinum certification from the Bundesverband Musikindustrie (BVMI).

Selling a record-breaking 800,000 copies in its first week of release,[2] "I Believe" debuted on top the singles charts in Austria, Germany, and Switzerland.

[3] The song was certified double platinum by the Bundesverband Musikindustrie (BVMI) for shipments figures of more than 1.0 million physical units.