There is Kate Moss, McFly (a band), and many more.
There is no concrete evidence to suggest that any celebrities are part of the Illuminati. The idea of celebrities being part of the Illuminati is largely a conspiracy theory with no basis in reality.
Kate Moss etc.
Some celebrities that have converted to Islam include Mike Tyson, Malcom X and David Chapelle. You can get more information about these celebrities online at the Wikipedia.
Some celebrities probably do have MSN but I know for a fact that celebrities have myspace eg Brendon Urie, Pete Wents (but most people make celebrities)
Most celebrities have acne but cover it up with makeup or are photoshopped. Some examples of celebrities that have been photographed with acne are Harry Styles and Cameron Diaz.
Only invite over the celebrities whom you know personally. Celebrities do not accept invitations from strangers.
Nobody
some do
Some are, but some can be great friends.
Ireland has lots of celebrities. Some would be celebrities known only in Ireland and some would be known around the world, like Bono, the lead singer of U2.
I'm not saying all celebrities, but because they are "famous", some of them are willing to do it.
Some do, some don't.