I have been trying to think of a theme for my sweet sixteen for a while now too, even though it is a long time away. I really like the theme of hollywood, but that was what we did for our eighth grade dance. Another good one is a masquerade ball, or like a murder mystery type of thing. A murder mystery might be kind of complicated though, and not everyone has a mask on hand for a masquerade. People might be kind of mad that they have to go out and buy one. Where would one even go to purchase a mask? I was going to ask people from different schools for ideas so that they haven't been done already in this school, or search around on the internet for themes.

As for getting your friend a present, it depends on how well you know this person. If you feel like you know their style well then get them jewelry, and even if you don't know it very well you can get them something classic that almost everyone likes, like a Tiffany heart necklace (if you feel like spending $100). I wouldn't get an American Express card becasue its not very personal, but if i wasn't very close friends with the person then it is fine.