I'm thinking the cast of bad guys includes Mr and Mrs Tspa. Was there or was there not a Trimspa event at the Hard Rock at that time? I can't remember.
Because if there was then it lends credence to Anna being there for detox. They wouldn't want her making any appearanes all doped up. Plus they'd (KE and co.) would keep her asleep so that she wouldn't eat and lose weight. Kill two birds with one stone (no pun intended)
I've been out so if this is rehash, i apologize.
Weight loss due to uppers balanced with downers. One of the ET interviews had her perky as can be, then needed help to get out of the van and had to be supported on both sides to go up a small set of stairs.