Hmmm, it would be difficult to determine what that best song might be and therefore who, other than myself, might even be appropriate to take on the task of performing it.
After perusing some of the threads here I've been inspired to write a few. I put together one called, A Dilly Of A Tale. It was about an unfortunate experience I had with some bad dill pickles. After playing it for some elementary school students one of them commented that it sounded like something Weird Al might sing. I've since thought that there were other things that I've written that Jack Black could have fun with.