Well, I've just gotta go with something by Weird Al. He is weird after all, and his music is no exception. I'd have to go with "White and Nerdy" above all else because of the so many modern things it makes fun of. Gotta love it.
White and Nerdy on Youtube
I won't let this world exist without me! If I die, we all die! / Avatar & Signature by anime_8000.
One the funniest songs I've heard, I'm suprised no one's posted, is Banana Phone.
YouTube - The Simpsons - Banana Phone
ring, ring, ring, ring, ring, ring, ring, banana phone!!
so many to name, but i would say the song from that one old snickers commercial with the guy that sings to the one black dude with the guitar, haha, i always crack up when i see that commericial