The Simpsons A Cappella

I've been an outspoken opponent of a cappella music ever since I got into a knock-down, drag-out bar fight with Bobby McFerrin back in the late-eighties (no that never really happened, although I have found that people who are big fans of a cappella do generally tend to be fairly annoying on many other fronts) but this all vocal version of The Simpsons theme is quite accurate and impressive:


(via)