Sweet SIxteen Theme

Im haveing so much trouble thiking of a theme.. I have so much to do and none of it can be done without a decission... Please help a grl out.. I was going for more like a color scheme kinda theme.. Like for ex. Red and gold... But idk...i have a best friend who had the theme of red and gold and im inviting the same people so i need somethin diff... Like another color and gold...