Meme Space Nyan Cat Rainbow Tail Costume Hooded Kigurumi One-Piece Pajama. From. $50. $50 at amazon.com. Pusheen Unicorn. Dress as everyone's favorite internet kitty, Pusheen, this Halloween.

Seriously, this Nyan Cat hat is the only part needed for a fantastic Halloween costume. It looks pretty good in this still image, but we dare you to watch the clip of it in action (embedded after ...