You know what two things crossed my mind? Everytime I've seen her on the news she sounded drunk/high, and she lost all that weight on Trimspa and I wouldn't be surprised if there was something in their products that did it (like that phen-fen thing or whatever that was causing people's hearts to fail). Maybe a combination of the two.
But that's just my morbid curiosity. The only person I feel sorry for in this situation is her baby daughter.