Here is the second song in the book of Dr Jazz:  Singin’ in the rain. The date on the music sheet says 1927 and it appeared to be taken from the hollywood review (revue).  So while at first I thought it was the dancing scene with Gene Kelly that was the original, it turns out that this song is from earlier date (see also this wiki). An interesting surprise !

Singin’in the rain (1927)

Youtube footage Singin’ in the rain 1927 – Hollywood revue

Music poster: Hollywood Revue of 1929

 Youtube – 1929:

Edward Cliff and Brox Sisters

Youtube – 1929 – Jack Miller