well this could be a good thing for her. this is a new beginning for her, so if she stays out of the media (and clubs) for a couple of months and come back looking healthy, thin and neat she might be ready for a HUGE comeback. and the day she shaved her head would always be rememberd as the big change in her life.
Talk about sales all you want. It's already been proven that Christina has more talent and will be around much longer than Britney, whose career is over.