There are some really funny songs out there, and all you can do about it is laugh at them, and recommend them to other people. Here some funny songs:

Ren and Stimpy-Royal Canadian Kilted Yaksmen
Stephen Lynch-Superhero, Special olympics, and pretty
much everything else by him.
Strong Bad-Trogdor, Everybody to the Limit, Strongbadia

So there you have it. Some of my suggestions. Tell me some of yours!