Futurama Meets The Simpsons [Mashup]
Inspired by the above illustration by Kate Yampolskaya, a bunch of creative (and anonymous) people on the Internet Photoshopped some more awesome Futurama/Simpsons crossovers in the same vein.
Milhouse is not a meme.
In the future, Lisa and Blinky are the same person.
This one is my favorite, though Bart/Zoidberg will give you nightmares.