Jim Dixon named a number of singers who could sing the Buble repertoire; well, forget Carole King, Nora Jones and Paul Simon. They are just not up to the job.
Willie Nelson is an interesting singer, but he hasn't got a big voice.
Harry Connick? I'm not a fan of his.
Bonnie Raitt? Well, she CAN do anything.
And, of course Tonny Bennett is the man!
But, Michael Buble is a fine singer who gets the job done with a lot of style and class.