Ultimately, you're going to have to ease up some. Think about it. In the grand scheme of things, what in the WORLD will multicolored hair cause, save a few tinted towels? Let her express herself so long as she's not doing illicit drugs and having orgies or failing in school! Teen years are tough enough without having to worry that "Mom won't let me do anything, so I'm going to resent her for it." High School girls are mean enough without being given reason to be mean, and unfortunately, no matter how good *your* intentions, they will view her as an outcast. Trust me, friends you consider trashy may just be her salvation of self and sanity on nights where otherwise her 15 year old butt would still be playing with dolls and a stuffed bear (which should have stopped YEARS ago.) You might ask yourself how I know all this. Your answer: I lived it. My mother was the daughter of the only doctor in town, my father; a well known realtor. On top of that, I was adopted. Expectations much? You betcha. Well, they wouldn't let me go anywhere or do anything that wasn't the social norm. Scratch that, *Their* social norm. You know, that their parents imposed on them? Well, suffice it to say that I rebelled as hard as I possibly could in every way possible once I realized that there wasn't much they could do to me that I wasn't already doing to myself staying holed up in my room with my stuff critters. Of COURSE you caught her drinking. She has no LIFE right now. She saw an opportunity and took it, because she's not been allowed to get any of her "bad" desires out of her system in smaller less destructive ways , as she's gone along, so they bottle-necked. It was "OMG I'm actually out of the *#$#$ house for once! What can I do so I'll actually feel like I've had an experience and so these people won't think I'm a sheep who lets my mommy control my every move? Drink, you say? Pass the Patrone!"
Seriously think about this. Please. Before your daughter ends up needing help you can't give her.