suds and lights perfumes and mmucosmetics have a bunch of perfumes that are nice for the budget and very teenager,hehe,for a more sophiscated dressed up occasion,i like ralph lauren hot,its sweet and spicy,it works for me and im a teen.
Anything you like, just as long as it's not too heavy. Light and clean is always a good bet if you don't know what else to go for. A lot of teens gravitate towards fruity.
So scents that make me think of teens are DKNY Be Delicious, D&G Light Blue, Body by Victoria's Secret and Dior Miss Cherie(this one is *very* sweet and fruity)
I think it depends on how old of a teen she is. For middle school and freshman teenagers I'd get them a Vicoria's Secret or Bath and Body Works Fragrance. But for Sophomores and up, my vote goes to Ralph by Ralph Lauren, and the Escada Fragrances (any of the ones in the heart shaped bottle.)