"Jammin'" is a 1937 hit song by the Andrews Sisters (Brunswick 7863). The song established the Andrews Sisters' popularity with their first record. The song was recorded in New York with

Leon Belasco Leon Belasco (born Leonid Simeonovich Berladsky; 11 October 1902 – 1 June 1988) was a Russian-American actor and musician who had a 60-year career in film and television from the 1920s to the 1980s, appearing in more than 100 films. Musi ...

and his orchestra on March 18, 1937, in the same session that also recorded their other Brunswick Records release, "Wake Up and Live" (Brunswick 7872).Harry Nimm
The Andrews Sisters: A Biography and Career Record
/ref> By October 1937 the sisters had signed with Decca Records.

References

1937 songs 1937 singles The Andrews Sisters songs Brunswick Records singles {{1930s-song-stub