Capital-FM DJ Steve Moore just shared this video:
http://www.youtube.com/watch?v=TnPINGavPP0
and I agree with Steve that it is extremely well done.
It looks at how Rock Stars should change their signature songs as they age. And most of the imitations, especially the guitar work, are quite accurate, once you realize that comedian Tim Hawkins is also trying to age the singing voices. All that said, he missed the obvious one: Bruce Springsteen's "I'm on Fire" to "I'm on Viagra", but how many songs can you do before the audience tires of the subject?
Even more apropos now that Gordon Lightfoot has seemingly given other artists permission to change their lyrics of their classic songs, with his change to "The Wreck of the Edmund Fitzgerald" to reflect new evidence that a 15.2 metre rogue wave sank her.
ref. - http://www.thespec.com/News/Local/article/742991