I think I would re-inforce what Lizbud had to say Kim, in other words an old saying comes to mind "choose your battles", now I don't alway's practice what I preach lol, but I guess you just have to weigh it all up and decide is it worth all the aggro.
I sure can empathise with you 100 per cent, so far my daughter is not too bad dress wise, but she has a strong sense of what she likes and dislikes, and at 13 I can still have a say as to what she wears, although she has her own money too.
I think it might be a case of grin and bear it, I know kim it is so hard HUGS, but be sure and compliment her when she looks really nice. GOOD LUCK you'll need it.:)