Füenf was a German a cappella quintet from Stuttgart, formed on September 3, 1995 by Christian Langer, Jens Heckermann, Patrick Bopp, Ralph Digel, and Hartmut Roller. Their debut performance occurred at an a cappella festival in Pforzheim later that year. They toured extensively across Germany from 1996 onwards. In 2003, they released the single "Mir im Süden" (2003), which was distributed in Stuttgart's public transportation system and led to the creation of the project Singin’ in the Train. Their album Haltestellenlieder (2006) featured these songs and won them the "Ort im Land der Ideen" award in 2006. They embarked on a final tour, Endlich!, concluding with two shows at the Theaterhaus Stuttgart in 2024 before disbanding. Other releases include the albums Füenf live (1998) and Feingefühl (2003).