Recognize the Reveler

Junko Kimura/Getty Images

Remember when it used to be a bad thing to have bunny ears in a picture?

Now, it's suddenly chic. Madonna wore them first, and now this tiny fashionista is doing the same at a soiree in Tokyo.

The celeb's sister joined her for the international bash and sported a pair of mouse ears herself.

Think you know who the party animals are? Find out after the jump...

Ashley Olsen, Mary-Kate Olsen

Junko Kimura/Getty Images

Let's hear it for Ashley and Mary-Kate Olsen!

The twins attended the Opening Ceremony reception party in Tokyo, along with Kirsten Dunst and Jason Bateman.

What do you think of the sisters' animal-inspired headpieces?

Sounds off on more star style by visiting our Fashion Police gallery now!

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