Only the obvious ones like Britney Spears, Amy Winehouse, Whitney Houston, Kerry Katona etc. Sometimes it seems like celebrity meltdowns make the world go round, there's always one going on or just around the corner to make people feel a little bit better about themselves.
I really wish Lindsay Lohan had turned around and given it some of this Sheen style rhetoric when it turned out she was partial to a coke fuelled party. "Yeah so what I like to shove a quarter up my beak and ride some dick, maybe crash a car along the way, what's up with that?!?"