"halloween is the one night a year when girls can dress like a total slut and no other girls can say anything about it"
...taken from the popular movie, Mean Girls, Cady Heron, played by Lindsay Lohan, learns that dressing up as a witch, pumpkin, or anything even slightly related to this holiday is seen as taboo. instead girls conform to the masses and the costumed population is split up (pretty evenly) between nurses, referees, cheerleaders, school girls, and some sort of western cowgirls. pre-packaged costumes generally rule the masses, making each bumble bee you see seem more and more unoriginal.
instead, i say, do something unique and different. why would you want to look everybody else? fashion is an expression of individualism. find an inspiration and go with it. something from pop culture, something that interests you, or just something funny.
some of the more interesting (and usually simple) costumes i have seen include:
--a twister board.. so original and cute!
--a pineapple.. sounds weird, i know, but it was sparkley and adorable
--the devil wears prada.. from last year but very ingenious
--the spice girls.. a great idea because they're back on tour