I disagree with the topic of this thread.
I also like to think that the famous FOTs are above what qualifies as a "celebrity" these days. Heidi and Spencer are celebrities. All those tabloid targets are celebrities. Octo-mom is a celebrity.
Patton, Galifianakis, Scheer, Tompkins, Huebel, Woliner, Daly, Hodgman,Leslie Ami Mann, etc. They are above meer "celebrity." They are TALENTED PEOPLE who are creating long-lasting, respectable careers for themselves.
But it is easier to just say "celebrity," and cut to the chase.
Nevertheless, it's Tom's show and Tom controls who gets on the air, famous, talented or otherwise.