Birthday presents?

My friends birthday is coming up and I want to get her something nice...
I have no idea what her interests are though! -I'm such a horrible friend :p-
I don' want to just give her money or vouchers cause I won't to get her something thoughtful but I...

just have no ideas.
I've tried asking her what she wants a million times but she is incredibly unhelpful!

-Homemade Cookies or Cake - wrapped up with ribbon in a box.
-Cookie Cake (everyone loves them)
-Clothes
-Purse
-Perfume
-Concert Tickets - for the two of you
-Dinner and a Movie - your treat
-Best Friends charm bracelet or necklace

make her a cake! or buy a cake! or whatever!! lol you could get her a gift card to target to buy what she wants or get her one of those like packages that have like shampoo and body wash and lotion and stuff like that! I give stuff like that to my sister and she loves because ik what her fav scent is!

-underwear
-voucher for somewhere
-earrings
-bracelet
-necklace
and make her a cake with her name on it!!!

everyone loves a good SURPRIZE party!!! you could rent a hall or something and get her friends to go, or a cake, clothes, jewellry

you kan maybe get her depending on what she is like emo or preppy or like tom boy or whatever but I always go to bed bath and beyond and make them gift baskets...

you could get her some jewellery that is special in some way that she will remember for a long time.

u can get her a pyjamas
if shes like your bff
get a cardboard and stick your pics of you and her make it really nice and make a cake and give it to her

u should go some cheap store or give her some of your jeans then write important/funny things that happened 2 you 2!! ex: I did this with my bff she luved it I put a lot of weid things we did/said I put birdy, by by nich, you like those I cant stand them c you dont get them its like your owne lil inside joke!!! lol