A serious article about Musical Humor. Damn, I feel old now.
Doctor Demento is where I first heard this:
Power Salad - My cat is afraid of the vacuum cleaner
Cliff Edwards was one of the best jazz singers of the 20th Century, but sadly he had addiction and most people today only think of him as Jiminy Cricket. 
Lars is apparently on a music kick.
What a great thread. I love musical comedy. It’s my go-to for feeling better and I wish I’d seen this thread before.
Here’s a few other fun artists/songs I’d like to add to the already great list:
Victor Borge. Just a generally amazing pianist (hur hur) and comedian. So many good bits, but here’s one from when he was younger.
Amazingly, no Tom Lehrer, but in observance of his passing just a few days ago, one of his songs:
And perhaps something a bit offbeat? Let me introduce you to Richie Kavanagh:
A few more, now in car theme!
Barnes and Barnes with Making Love in a Subaru!
Playmates and their classic Beep Beep
The ultimate version.