a dress
You should wear your best outfit you have and get answer.
Rainbow
maximum originality
depends on the theme and what the birthday girl would wear :D
something totally awesome
First of all, a 16 year old does not want their mom at their birthday party. If you are one of the lucky moms that don't embarrass your kid at that age, then whatever you wear will be fine.
I wanna wear your skin to my birthday party
The Adjective in the phrase "tropical birthday party" is tropical and birthday. EXPLAIN: What kind of party? Tropical party. What kind of party? Birthday party.
A birthday bash is a birthday party.
A birthday party for someone turning 2 years of age could be spelled "2nd birthday party" or "second birthday party."
What you should wear will depend upon the type of party. If the party is more casual, you can just wear pants and a top. If it is more formal, you should wear your best, such as a dress or tuxedo.