How?

How did demi get into rehab? Some people say by cutting herself..... but I was reading a magazine and it said that she was on one of her tours and the night before she had been partying and got into big trouble! She said that she thought that one of her backup dancers had been the one to tattletale so she was angry went up to the backup dancer Alex and punched her in the face! WOW! Poor Alex I feel bad for her!