what counts as a celebrity wedding?

Back in the olden days when the Medicis were marrying and poisoning each other, I suppose they were the Renaissance equivalent to our modern day celebrities - people well known for being well known and nothing else. So apparently the wedding of Nicole Kidman - well known for having been married previously to that other well known personality Tom Hanks - to Steve Irwin - well known for hunting crocadiles - was the celebrity wedding of the year. Big deal. Why should we care? The "darling of the women's magazines" and some dude who is more famous for wrestling crocadiles in America than for doing much in Australia get married. So what? I got married once. It must have something to do with who gets invited - as in Princess Mary's wedding last year. Why do I not hear about marriages in Prince Leonard's of the Hutt River Principality family? Wouldn't that make an interesting guest list? The guest list at my wedding was very spectatular to me and my ex-wife and that is what should matter. Why need the media be interested in who gets invited and who doesn't? Are they trying to embarrass someone?