I Need Help Please!

I`m having my 15th birthday in may...and i need an AWESOME idea of what to do..becuase my friend had a party back on feb. And it was totally rad! but i have no idea what i should do...beucase i need it to be like better than her or just as good! plus im having friends my highschool and some older friends that don`t go to the same highschool as me...HELP PLEASE! or else my mom might plan it!!