I'm not sure yet, but I've got a few ideas floating around. I see you are relatively new. YT has a really fun Halloween costume contest, so you better think of something really good! There's lots of awesome prizes to be won! last year was my first year on YT and participating in the contest (halloween is my thang!) and Uni won a prize! This was her costume, an AT-AT walker from Star Wars
The photoshopped pic was disqualified bc you are not allowed to photoshop pics, BUT I didn't know that, and so my other pics were still in the running. The non photoshopped pic was the one that won one of the many many prizes available!
The BEST costume ever IMO is Nancy1999's Joey in the spider costume. Just EPIC! Her youtube vid of him was what got me on YT in the first place.