Its my friends birthday. She's turning 15 and I have no idea what to get her without spending over $25

Well, if you have some pictures of the two of you together or sepereated then you can always make her a scrapbook. Inn my opinion, those are better than the most expensive jewlery or prize in the world because they aare memories forever preserved in a flash instant.
Hope it helped
Nikki

Do you share similar tastes and interests to your friend? If so, think about what you would buy/how you would spoil yourself if you had a spare $25 to spend... perhaps your friend would like this too?

If you have different tastes, think about how your friend spends her free time... Does she play sports? Does she dance or play an instrument? Is she creative? What about her appearance? Does she like wearing accessories? Earrings? Make up? What is her favourite colour? Who are her favourite artists? What are her favourite TV shows?

By considering the above questions, you will become clear on what your friend likes, and appropriate gift ideas should flow freely. The best gifts are those which are chosen with the recipient in mind and which come from the heart. The fact that you posted this question tells me you are already half way there! The thought you are putting into your friend's gift shows it comes from the heart. She's lucky to have such a thoughtful friend!