While at the Kabarett der Komiker, she met Norbert Schultze, who had composed the music for "Lili Marleen". Lale recorded the song in 1939, but it would only become a hit when the Soldatensender Belgrad (Belgrade Soldier's Radio), the radio station of the German armed forces in occupied Yugoslavia, began broadcasting it in 1941. "Lili Marleen" quickly became immensely popular with German soldiers at the front. The transmitter of the radio station at Belgrade, was powerful enough to be received all over Europe and the Mediterranean, and the song soon became popular with the Allied troops as well.
Lale Andersen & Orch Walter Baumgartner - Regen in April