Did Mary Kate Olsen Really Went to Rehab for Drug Addiction and Covered It Up With an Eating Disorder Clime?

my friend told that he saw her 2 years ago passed out in a club in ny because she did to much coke and alcohol i don’t know if this true but
if she did covered it up with the ed clime? iCan see why she is idolized by millions of kids and she needs to keep her image you know? and they say that the rehab center she went to does not treat ed?? if any body have some facts about this feel free to answer.