Some of the information is Boop-Oop-a-Dooping full of SPOILERS. Boop-Oop-a-Doop!
That's My Weakness Now was written by, Sam H. Stept and Bud Green, (words and music) in 1928. This became their first hit song together, having been made popular by singer Helen Kane that same year. Betty Boop performs this in Stopping the Show. In the first Betty Boop Cartoon Stopping the Show (1932) which was a set up of a vaudeville show where Betty comes out on stage and performs some impersonations of Celebrity's each one of these are set up with a little photograph of the personality where they animated the lips like Fanny Brice who says "Can you imitate me Betty Boop?" The very first one is not set up that way. It starts up with a long shot which pans over the audience and in the background you can get the image of a image that is supposed to be on the photograph that looks like the silhouette of Helen Kane and it immediately cuts to Betty Boop singing That's My Weakness Now which was a song that Helen Kane made famous but they do not have the intro of Helen Kane to establish that she is imitating Kane. The clip was cut becuse you can hear the splice and you can see the thing in the background. That was cut out so that they did not have any evidence becuse they were showing the films at the court so they were comparing the Helen Kane films to the Betty Boop ones to see if they could find any delibriate paralells. If that Scene had been left in Helen Kane would have won the lawsuit that she had launched against both Paramount Pictures & the Fleischer Studios.