Birthday ideas for a 13 year old?

Ok plz no themes.... like no " movie star for a day" or "girls night out" and stuff like that.... Im gonna have boys and girls so please nothing lame.... OH and turning thirteen is a real big deal to me since im becoming a teenager so please nothing easy and something everybody has done like a plain old sleepover or pool party... something people will be like aww that was the best party ever!!!!! And a party where people can pretty much do what they want like talk and stuff. plz give me ideas!!!!!!! THANKS!!!!THANKS!!!