Sweet sixteen Themes?

So im having a sweet sixteen, and i came up with a great theme which was masquerade and i told my friend who is having a quinceanera and said it was a good idea , and when i was over at her house she had all these masks and I asked her what they were for and she said it was for her party. I told her i had the idea first but she said she told me which didn't and said that i should just do it anyways but i dont wanna do the same theme cause it wont feel right and my friends will accuse me of being a copycat or something!! So I need a new theme so i can start planing everything