How old is your girlfriend and do you know what fragrances she likes now? That would be a big help in steering you in the right direction.
Off the top of my head:
Chanel's Coco Mademoiselle is kind of fresh, sophisticated and aimed at 20/30's.
I find Fifi Chachnil sassy, sophisticated and fun, but it might only be available online. I can't find it locally.