OKAY....so I got an invite to a friend from colleges' Haloween party. We ALL HAVE to go in fancy dress / costume.I REALLY DON'T KNOW WHAT I'M GOING TO GO AS!Haloween is by far my favourite holiday, and don't want to mess it up by choosing a crappy costume!SO pretty pretty please could you comment on what you think would be a cool idea.I would realy realy be sooooooo thankfull to ANYONE who...