My good friend Nataliefirexx asked nicely this morning if I'd take the 3t2 Monster Mash Beanie by Trapping and make it into a deco object. I was glad to. I have a headcold and had nothing better to do - so in about fifteen minutes, this was born!
Here's two (non-repositoried) versions of the hat. One is identical to what's on a sim's head, and one is laying on the ground and crumpled. It should be basegame compatible and comes in one colour.
Download here! Find in Deco > Misc for $100.