What should i do 4 my sweet 16?

i am a girl and i wanna have a rockin sweet 16 like any other girl. i wanna invite about 7 of my close friends but i dont know what 2 do. my birthday is in march. i know...i know! its a little easrly but i want my party 2 be good. i am on a low budget so what should i do? and does anyone know any good websites for parties???HELP!!!!!!!!