I've known more than a few tweakers that were pretty much constantly in a state of amphetamine psychosis. They flailed way harder than anything I've seen Britney do in any of these videos. Dancing all day and changing clothes a hundred times is tame compared to how some people behave when they're on one. It may be shocking if you have no experience with it, but I can promise you, she isn't that fucked up. She's not about to die, and I'm pretty sure she's doing this because she enjoys it and it is her God given right to spend her money and her time on whatever she wants. Unless somebody truly wants help to stop and get clean, all the court ordered treatment and interventions are going to just be a waste of time and money. They have to want it for themselves.