This has to be one of the funniest mashups I've seen in a while. Brantley turned me on to this piece of genius, which he found via this page. The video tends to get rapidly taken down by copyright claims by Lazytown, so if the link I've provided doesn't work, try searching YouTube for "lil jon lazy" or "lil jon lazytown". You'll be glad you did.
I had to mp3 this one for my eternal listening pleasure.