As mentioned on a Bob Dylan XM radio broadcast, Louis Armstrong appeared in a Betty Boop short.
One of the classic Depression-era musical cartoons created by Max and Dave Fleischer. Satchmo's soundtrack obviously inspires the artists - even if the visuals aren't in any way “politically correct” 70-plus years later.
Yes, besides the wince-inducing racism, this piece is a great meld of Fleischer brothers cartoon, live action of Louis Armstrong's crack jazz band of the 20s and 30s - The Hot Fives and Sevens, and Mr. Armstrong's floating head.
