Do you have any pictures of the room that you could post?

I recently redid my 15-year-old DD's room and have seen several makeovers on this forum as well. Each is as individual as the girls whose rooms they are. Since often girls this age have very distinct taste, but don't know how to put it all together or see how all the various choices work together, what really helps is to find some inspiration pictures and work from that. A good place to start is with bedding: PB teen is a great resource for ideas; but often similar items can be found for less at JC Penney's, Bed Bath & Beyond as well as Target and Walmart. Check their websites for best selection. Look at solutions for dorm rooms to get ideas as well, though late summer/early fall is best time for this. Think about your daughter's storage and study needs and take those into consideration to see if you need to change augment her furniture. IKEA has many study, storage solutions as well that are relatiively inexpensive. Daybeds can be a good choice.

Here is a link that might be useful: Pottery Barn Teen