Matthew Morrison
In 2010, Matthew Morrison of Glee fame hosted a Halloween party. He decided to dress up as fitness expert Richard Simmons to his own party! The actor achieved this look by wearing curly hair and short spandex sports. Do you think Simmons approved of this look? We bet that he totally loved it.

Matthew Morrison
Isla Fisher
There are also a lot of costumes that totally conceals the identity of the person wearing it. We doubt that anyone could have guessed that Isla Fisher was hiding in this sock monkey costume. In 2012, she and her husband Sacha Baron Cohen wore full-body costumes that made them completely unrecognizable. If you were curious, he decided to be a cow wearing a gorilla ski mask.

Isla Fisher