Neeed Birthday Gift For Best Friend

Ok guys and girls. My best friends birthday is coming up soon. My best friend is a Girl. I dont know what to get her. I hav esome purfume to give her but it was a Christmas present but we had a fight then etc so im giving her that. But I not sure what else to give her or if I should give her money. I was thinkign of giving her 25€. What you think? Any Suggestions?