It occurred to me that, having horns, all unicorns can be classified as "pinheads". Therefore, in this case, I guess the pinhead has been doubled?

"My Little Pony: Friendship Is Magic" is the property of Hasbro.
"Spongebob Squarepants" is the property of Nickelodeon.

This was uploaded shortly before the Wikipedia anti-SOPA blackout. I say bravo, fellows!