Present ideas for a teen girl?

Okay, so its my bestfriends birthday in approximately one month and i'm not good at buying presents. shes turning 17 by the wayyy so i wanted to get her something nice cause she has moved away and maybe i thought i could get her something to remember me by. if that makes sense haha. but i cant think of anything ;l so just to give you a little bit of info about her; she isnt girly at all. doesnt wear much jewellery or anything and isnt really interested in fancy clothes. so i dont really want to get her cheap jewellery or a handbag but however im open to any suggestions. thanks heaps.