The Comedian Harmonists were an internationally famous, all-male German close harmony ensemble (5 singers and a pianist) that performed between 1927 and 1934 as one of the most successful musical groups in Europe before World War II. The group consisted of Harry Frommermann (tenor buffo), Ari Leschnikoff (first tenor), Erich Collin (second tenor), Roman Cycowski (baritone), Robert Biberti (bass), and Erwin Bootz (pianist). The hallmark of the Comedian