Rock stars have been making cameo appearances on 'The Simpsons' for so long that we basically can't remember a world without them. And there have been so many over the years that selecting just five to highlight on this Diffuser.fm special about rock star cameos on 'The Simpsons' was not easy. Luckily, we've teamed up with our friends at Loudwire and Ultimate Classic Rock to join us, because there are plenty of cameos to go around for all of us!

Click the big blue button below to get started taking our tour of the best 'Simpsons' musical cameos, and don't have a cow if your favorite one was left out -- feel free to add a comment and tell us all about it. Enjoy!