Who do you think which celebrity under 30 would die next?

The 25-year-old Brad Renfro died of a drug overdose last week, and today, the 28-year-old Heath Ledger just died. I can't believe that these two young celebrities had joined James Dean, Janis Joplin, Jimi Hendrix, and Jim Morrison in a list of celebrities who died before reaching 30 as a result of their peaking fame. Now I fear more stars under 30 would be killed soon due to their quick stardom excesses, so I'm now asking you this question: Who do you think which celebrity under 30 would die next, and why?