I've been playing guitar Friday nights with some guys at my Temple, and one of them told me this story.

He had been hired to play for a party, and the party had also hired an Elvis impersonator (at least, I think he wasn't the real thing). PseudoElvis walks up to my friend and the band and says, in his pseudoelvis voice:

PE: So, what do you guys know?

Band: Well, we'll play anything you want. How about "Don't be cruel"?

PE: (still in PE voice) Uhhh, I don't know that one....