What is going on with Rod Stewart's children and why do they think they are more important than they really are?

Do they have singing ability? Do they have a discernable talent? Do they do charity work? Kimberly Stewart (the chick who was on E! that fell off of the motorcycle as cameras rolled and used to hang with Paris Hilton) and Sean Stewart (he was in.....he used to sing with.....well, he did a.....nevermind) whose claim to fame is being on that goofy show about Hollywood sons and has been arrested twice in recent months for beating someone up. I guess I would put them in the same category as Kim Kardashian...not really sure why they are famous but they are...