This is an utterly ridiculous concept, playing all of Billy Joel's hits (or at least all of them from The Essential Billy Joel, disc one) simultaneously. Which is probably why I laughed so hard when I saw it on RegrettableMusic.com. You can barely make out any real melody or song, and somehow, the less discernable the noise, the funnier the idea becomes.
Check this out and take a look at the YouTube site this is from for Celine Dion screaming for 1.5 minutes. And follow RegrettableMusic.com. They do for bad music what Mystery Science Theater 3000 did for bad film.