Andrews Sisters - Bei Mir Bist Du Schoen (1938)

It's rather embrassing but as a youngster I heard this song on the radio and I thought these girls were singing "My Dear Mr. Shane". It was only later that I knew my German language skills were relatively non-existent. Danka!
The Andrews Sisters were born in Minnesoat to a Greek immigrant father and a Norwegian American mother. They started their career as imitators of an earlier successful singing group, the Boswell Sisters. After singing with various dance bands and touring in vaudeville they first came to national attention with their recordings and radio broadcasts in 1937, most notably via their major Decca record hit, Bei Mir Bist Du Schoen (translation: To me, you are beautiful), originally a Yiddish tune, the lyrics of which Sammy Cahn had translated to English and which the girls harmonized to perfection. They followed this success with a string of best-selling records over the next two years and they became a household name by 1940.
They recorded 47 songs with crooner Bing Crosby, 23 of which charted on Billboard, thus making the team one of the most successful pairings of acts in a recording studio in show business history. Their million-sellers with Crosby included "Pistol Packin' Mama", "Don't Fence Me In", "South America", "Take It Away", and "Jingle Bells", among other yuletide favorites.
The Andrews Sisters' popularity was such that after the war they discovered some of their records had actually been smuggled into Germany after the labels had been changed to read "Hitler's Marching Songs". Their recording of Bei Mir Bist Du Schön became a favorite of the Nazis, until it was discovered that the song's composers were of Jewish descent. Still, it did not stop concentration camp inmates from secretly singing it, this is most likely since the song was originally a Yiddish song "Bei Mir Bistu Shein", and had been popularized within the Jewish community before it was recorded as a more successful "cover" version by the Andrews sisters.
Along with Bing Crosby, separately and jointly, The Andrews Sisters were among the performers who incorporated ethnic music styles into America's Hit Parade, popularizing or enhancing the popularity of songs with melodies originating in Brazil, Czechoslovakia, France, Ireland, Israel, Italy, Mexico, Russia, Spain, Sweden, and Trinidad, many of which their manager chose for them. The Andrews Sisters became the best-selling female vocal group in the history of popular music, setting records that remain unsurpassed.