Generally, the use of Auto-tune isn't often the artist's decision.
And there is enough live footage of Bubl� singing to make it obvious he don't NEED it. I've heard Celine Dion subjected to Auto-tune on records... anyone think SHE needs it? It's part of the modern producers arsenal of tools, and usually over-used.
Try this... listen to the 'fan' singing.
http://www.youtube.com/watch?v=_cw1uLVSl1Y His intonation gets suspect, but Bubl�'s doesn't. Same mike. Cut the guy some frickin' slack. And really... Cliff Richard as a comparison? Apples and oranges. Not to mention, if you want to be fair, wait until Bubl� has had 55 years to build a resum�! Cliffy's OK, but he didn't even compare to his contemporaries. Remember, he was doing his thing when Sinatra WAS at his peak of maturity, and no sane person is going to compare Cliffy to Sinatra as a singer..!
Legend? Maybe, but not for being the greatest singer ever, LOL