File:GravityFallsReferenceinEddsworldHq.png

Summary
In a frame of the recently released episode of the popular web series "Eddsworld", titled "Fun Dead", a young girl is seen in a few frames bearing a resemblance to Mabel Pines. She has similar hair, both have headbands, braces, and sweaters.

This is the video of the source of the image, it is an episode of Eddsworld, titled "Fun Dead": http://www.youtube.com/watch?v=3w1pFW44xkM