With Louis Armstrong

Superman is responsible for several acts of sabotage at the Yokohama Navy Yard in Japan. Lois Lane is held hostage but Superman saves the day. Animation by William Bowsky and William Henning. Music by Sammy Timberg. Produced in 1942.

From The Public Domain Movie Database: Betty Boops efforts to stay in shape backfire when she becomes entangled in the exercise equipment. Jimmy seeks help for Betty, but becomes easily confused. In the meantime, Betty is becoming skinnier by the minute!

Memorable rendition of "St James Infirmary" by Cab Calloway

Betty flies to Japan to do a show, and sings the title number. She then dons a kimono, and sings it again in Japanese. (http://en.wikipedia.org/wiki/A_Language_All_My_Own)

Betty Boop withdraw in 1939. This cartoon might be her best from that year. Her house is invaded by lively crows and she finds ways to handle the problem.