If you don't believe me, listen to this. (Record Robot requests that you please right click this and download it rather than stream it.)

This begs the questions:

• did he mean to sing like that?
• did he know he was sounding like a muppet?
• what did he mean to sound like?

Taken from Record Robot which is a cool site. I must get round to listening to more of the mp3s on there.