I don't think that's really appropriate, but maybe a 12 year old.
If you are going door to door or a costume party-yes.
Heck no are you crazy
If an individual feels it is right to wear a certain costume, than he or she can. There should be no limitations to what an adult should wear as far as costumes are concerned. For a general idea of what an age-appropriate adult costume looks like, though, check out this site: http://kccbigcountry.hubpages.com/hub/Halloween-Costume-Ideas-to-Wear-to-Work
a butterfly outfit or a pixie costume
a regular everyday clothing perhaps? i usually go to Halloween parties with a nice banana costume!
A Frankenstien costume.
Maybe a superhero or character you like.
Franco Kids Cleopatra Egyptian Princess Halloween Costume, hopefully...
It depends on what kind of party it is. If it is a pajama party, wear your pajamas, if its is a pool party, you can wear your swimsuit. Halloween parties? Wear you r scariest Halloween costume. ^_^Depends on the theme once you find out the theme Google costume ideas or look on Pinterest
Most wear a costume and go trick or treating.
It all depends on what you want. If your friends are going to, you will find it more fun.
rich person, model, princess idk You could be a prom queen or vampire