The Phoenix Nights comic, who claims that he only tunes in to the ITV talent show as a last resort, also spoke out over Frankie Cocozza's exit.
Speaking on Magic 105.4, he said: "I'll only be watching because there's nothing else on. It amazes me people are so wrapped up in it.
"The bottom line is it is as dull as dishwater. You know when you are in a bad do when they're all in Marks & Spencer ads."
Of the Cocozza controversy, he joked: "I bet they're kicking themselves about Frankie Cocozza now that they've stuck him on that ad!
"I bet he gets quickly whipped out! You'll be watching the Marks & Spencer ad tonight and his face will be blurred out! People will be going to Marks & Spencer to try and get drugs now!"
> Frankie Cocozza to be edited out of X Factor M&S adverts
> X Factor finalists to star IN M&S ad campaign
Watch a clip from Peter Kay's first live tour in seven years below: