Swing Wedding by Rudolph Isling and Hugh Harman (MGM, 1937)
Harman-Isling managed to create a cartoon caricaturing African American celebrities of the ’30s in a slightly less racist way by having them appear as frogs. Slightly.
Points for picking out Cab Calloway, Fats Waller, Ethel Waters, Louis Armstrong, Stepin Fetchit, Bill Robinson and the Boswell Sisters. Bonus points if you can spot the very family unfriendly drug reference!