Simpsons, The Easter Egg - Message from the Futurama

This egg is located in the Springfield Police Station. As you enter and pass the cells (ignore Chief Wiggum), you will come to the back of the room. There is a poster of Homer's mother, Mona, and a notice board. You will notice that the wanted posters include Philip Fry and Zap Brannigan from Futurama.

By the way, it's worth noting that I found this on the Xbox 360, and I'm not sure whether it is on other versions.