Demi said some of her best friends from before treatment didnt even call her once when she was in treatment and stole her clothes and her wardrobes were raided when she got out and its a well known fact on the disney forums etc that Anna-Oliver was the person Demi spent a lot of time with pre-rehab and none at all after rehab.
And the Miley bong incident was well publicised...Anna was called out after the tape leaked