Frische teutsche Liedlein is a five-part collection of songs, which was written and published in 1539-1556 by the doctor, composer and song collector Georg Forster (around 1510 in Amberg – 12 November 1568 in Nuremberg). It comprises 380 polyphonic, predominantly secular German songs. The collection later received its collective name. It is the most extensive and important song publication of the time and one of the most important sources for tenor singers (with the cantus firmus in the tenor, such as a version of Innsbruck, ich muss dich lassen by Heinrich Isaac and Mir ist ein rot Goldfingerlein by Ludwig Senfl).