A fascinating essay by k-punk can be found here. (The drugs thing, though discussed in a very interesting and well-worth-reading manner, is dispensed with in the first few paragraphs.) I disagree with his stance on pornography (he's a Marxist, so that's unsurprising), but the piece is well thought out and definitely better than most of what's being published on the nature of celebrity, particularly the voiceless and thus tabula-rasa-ish kind that fashion models represent. Go read it.
k-punk on Kate Moss