text: what should i get my 17 year old girlfriend for her birthday?   do not try to ask her or it won't be a surprise.  not all girls are the same when it comes to gifts.  first, you must know her attitude and likes {music, computer, dress, fashion, painting etc.}  second, she is your girlfriend. give something sweet but memorable. something sweet but unique  third, when it comes to price. do not buy too expensive gifts or too cheap gifts.  fourth, buy a thing which is appropriate with her attitude, lifestyle and likes.  your question is what right? not how...   but since i don't know your girlfriend. try following the steps i gave you. (^_^)