The most expensive Halloween costume in the U.S. is the deluxe Elvis Presley costume being sold on the Party City website for $1000.00+tax and it only can be purchased over the internet.
I think that the scariest and most popular costume is SCREAM! HAPPY HALLOWEEN
The most popular costume and accessory bought during halloween is a ghost or a witch. The most popular halloween accessory is a witch hat or broom and a sheet for a ghost.
It was a witch.
A Princess
witch
Pin the tail on the halloween costume with the most orange on it.
it is jason voorhees
Most wear a costume and go trick or treating.
Dress as yourself obviously
If you would like to do your halloween shopping online, I would strongly suggest going to Ebay or Amazon. Also, most costume or party stores have online stores as well.
Judging from the responses here, the most popular boy costume was "girl"
As long as it is not past Halloween, it isn't too late to get a costume. Costume stores are open on Halloween and days before.