I know what show you are talking about I have seen it a few times and know many of the people that appear on the show (at least the celebrities). I have also been successful in determining some of the other people. One episode I watched had the programmer who created Word, another one was Craig of craigslist and various other people. It is ok if you really want to learn who people are.

Perez Hilton got her fame from the media simply because she is the daughter of Hilton Hotels mogul and has made a point of being in the media because of her stupidity (drunk driving, party girl, etc).

I've heard of Perez but thankfully his "fame" hasn't made it over to the UK yet. I can't stand people who are only famous for being, well famous. I think our version of people like this is Liz Hurley, what has she ever done apart from wear a dress meade of safety pins once?