There is a video at
www.tmz.com where the site owner (Harvey Klein is it?) is being interviewed about her melt down. He and the interviewer discuss whether this could be onset of mental illness vs. substance abuse.
Klein states that she may be depressed but that according to many who know and hang out with her, this is most definitely a substance abuse problem. He also said he did not feel free to say which substance.
Any guesses on her drug(s) of choice?
Mine are: Alcohol, for sure. Plus others, but don't know which ones. She was surely out of it in that one video from several years ago.