Sweet Sixteen Themes

I`m planning my Sweet 16 which will be in about a month...but it`s going to be a low-key party just to hang out with all my friends and have fun-- no Sweet 16 "court" or formal dinner or anything like that. Just a casual party.
Anyways, I LOVE rainbows, so I was thinking about making rainbows my theme... It makes planning for decor much easier!
But another idea is "Party like a Rockstar." Have everyone come dressed up in rockstar fashion, or as their favorite rockstar. This way your guests can go all out on attire, but they don`t have to and it`s totally cool.

Just some ideas (: