Michael Buble appeared on American Idol to replace a flu infested Tony Bennett. I was really surprised at his incredibly weak performance of Call Me Irresponsible.  Talk about "pitchy".  Also, why was it that some of this words faded off without being heard?  He made the AI contestants sound like musical geniuses.  He isn't great looking, his joke about Antonella Barba was lame, and his movement across the stage was the worse I have ever seen.  Why is he so popular?  He is now the second guest singer that performs poorly in front of millions of American Idol viewers.  The first was Gwen Stefani.  She was badly dressed, picked a terrible song, and had a guest who had one line.  To think she mentored the AI singers.  Well, this is all leading to next weeks guest: J-LO.