I agree wholeheartedly, Rap.....that nobody sings certain hits better than the initial recording artist.
Even on American Idol, contestants were often chastised for attempting to take on a signature hit.
That said, I've gone back and compared Diana Krall's version with Julie London....and Ms. Krall's is far superior.
Plus, Julie didn't play the piano, did she?
....I'll give you "Crazy". Patsy Kline owns that.