Musical comedy is rarely explored in animation, and I don’t know why that is. I can imagine all kinds of fun stuff. Here are some great examples I found on YouTube. Most of these are comedy acts built by actual bands. First, two examples of the same song.
A band can have a variety of characters who get to step in for quick gags.
And of course, no such collection should be without at least one example from the famous Spike Jones.
Spike Jones created “Der Fuerher’s Face” here mixed with some Disney animation from the short of the same name.