I need to know, for a post, who actually wore a ridiculous outfit to the party

PLEASE.

Not an outfit but Luna did wear her lion hat, it even roared

I'm not sure harry would count that when he doles out the prizes. weshall see.

Groot absolutely did - even if I have had too many game tags lately to get him in there.

Layla42 : aww groot

Thor did!

he SURE did and ed wants to know where he bought that

THey can go shopping together some time!