Has anybody entertained the thought that perhaps, Brittany is at a point in her life where she is "on her own". What I mean by that is since her early childhood Brittany has been performing. Having her mother cheer her on every step of the way. Brittany didnt have a child hood like you or I. She spent most of it in the spotlight. I am sure her life has moved at light speed and before she knew it, she was married with children. Brittany has never had a chance to really get to know herself. She still is very young in her early 20's.

Perhaps shaving her head signifies a "re-birth" of sorts. Shedding herself of her head of hair may seem in her mind to shatter the perception that everyone has of her.
Maybe she wants everyone to know that she is just flesh and bones like the rest of us. She feels, she hurts, she cries and she even gets depressed. I understand that she chose to perform has her career, and as such she will be in the spotlight. But what you see isnt always what it seems.

Just my 2 cents.