During this time, German commercial television station RTL's attention was drawn to the pair.

Following several successful live gigs, the band was invited to perform as the supporting act for the Backstreet Boys' October 2005 tour of Germany, Austria and Switzerland.

At the end of 2005, the band recorded their debut album, Unbeschrieblich ("Indescribable"), which was released in Germany on 31 March 2006.

The band recorded their fourth single, Sonnenschein ("Sunshine") with Vanessa Jean Dedmon, a semi-finalist from the third series of Deutschland sucht den Superstar (the German version of Pop Idol).

Rapsoul's second album Achterbahn ("Rollercoaster") was released in 2007, from which the singles Erste Liebe ("First Love"), Laura, König der Welt ("King of the World") and Sterben für dich ("Die for You") were taken.