it all depends on what she's interested in.
If she likes music, think about a CD of her favorite band or an iTunes giftcard
reading: a book from her favorite author or a giftcard to Borders
clothes: a shirt or scarf of jewelry from a popular store or one she likes
those are just some ideas...
you can give them better friendship or more trust at least thats what i would do
2 tickets to a great cheap and not too busy island!!
A car.
First off, it depends on what she likes. She will must likely love some of these:IPodMakeupNecklaceBraceletRingFlowersNew DressAnything expensive really.
a gift for what? birthday? just because? flowers are always sweet. its something she will definitely remember too
It really depends on what your girlfriend likes. Earrings? Music?
Something Unique and out of the Ordinary that you know she would like.
Make her a card, and show her love.
If you been dating her more than a couple mounths . Then you should get her a gift
Since it's your girlfriend, you could send her one dozen long stem roses. This gift would be a romantic, thoughtful floral gift for her.
If you want a unique gift for your girlfriends 21st birthday, you can go to www.ugiftideas.com/girlfriend. This offers around 100 ideas to choose from, so you will most likely find the perfect one of a kind memorable gift.
Unless your girlfriend is an adult and/or your fiance, this sort of gift may be too "personal" a gift for you to give her. Her parents my consider this inappropriate.