What do I get my girlfriend for Christmas?

Okay so, my girlfriend and I have been together for almost a year, but just started officially dating about two months ago, and I have not a clue what I should get her for Christmas! I want it to be a gift that she will be amazed by, by unfortunately, I only have about $50—$75 to spend. She plays softball in the spring and basketball in the winter. She LOVES GLEE! She is very fashionable, and is always dressed very nice, and she really likes to wear jewelry. I also think that she likes softball a little bit more than basketball. She also really likes Lea Michele!
*Also, this is a High School relationship, if anybody is interested in age, because there are obviously many gifts that don’t necessarily apply to teenagers.