Personally, I feel the finger should be pointed at her parents. The pressure she endured must have been torturing starting out at a young age and her mother pushing her to stardom. Maybe she didn't live her infancy as most kids do and enjoyed her youth so she tried to live it out in her (using the term loosely) "adult years" and got involved with the wrong crowd. Anyway, I'm going for the parents as being the dominant factor towards Britney's madness.
Don't get me wrong, hate her songs. I'd actually go out on a limb here and hope deezlepope doesn't look in this thread when I say I would take my chances listening to Celine Dion than Britney (Ranting Raving Lunatic) Spears.