My dd12 loves HS Musical, Hannah Montana, and the rest of the disney tween shows. She wants the HSM2 dvd for xmas. She likes the Sims games, whether for a game system, computer or internet. Aeropostale is probably her favorite for clothes, used to be Limited Too, but they don't fit her right anymore (I guess they aren't quite made for girls who are starting to get their curves ). The magazine she likes the most is U14, because it has lots of pictures of the people she likes (HSM cast, Jonas Bros., Hannah/Miley, etc.).
She already has a DS, but I saw they came out with a new pink DSlite that comes with Nintendogs and has two little paw prints on the cover, looks very cute. (price was $130, might be better on BF). If dd didn't already have ds and nintendogs, I would get it for her. They also have one for boys that comes with Zelda and is a gold color to match.