Michael not Signed up to X - Factor
I'm not surprised in the slightest seeings as it was an "insider" who leaked the story he had signed. I'm pretty sure if he had then there would have been alot more secrecy around it and a big build up.
Anyway, I'm not to sure what Simon Cowells take on Michael is, I'm pretty sure he panned Michaels last album Invincible.
They do get big A-list stars on these shows so I don't think it would be beneath Michael to appear, plus its huge publicity here in the UK.