Cracked pays people to make smart memes. Visit the Photoplasty and Pictofacts Workshop to get in on it.
You know those animated/CG characters who sound familiar, but you can't quite place the voice? They just might be hiding a super-famous person doing the voice acting. Surprisingly often, relatively well-known characters are voiced by unexpected, yet incredibly familiar actors.
This contest was suggested by Tomkat53, whose Pictofacts "voice" is instantly recognizable.