Originally posted by dockpipe:
I'LL DIE WITH OUT MY ITUNES!!! THAT'S MY MAIN MUZACK FOR BOLZZACK
That's the main music for your ballsack? Wow, we better get you fixed up then.
Somewhere in your home folder, most likely ~/Documents/iTunes is a file called iTunes 4 Music Library. It's corrupted, so throw it away.
When you relaunch, you'll have to drag all your mp3s into the iTunes window again to see them, as the file you just tossed had all that info.