MTV blogger Eddie Wright posts:

This Sunday, December 9 at 8pm on FOX, “The Simpsons” hometown of Springfield collides with Portland in “The Day the Earth Stood Cool.” Fittingly, the episode, guest-stars “Portlandia” creators Fred Armisen and Carrie Brownstein ’98 as hip parents who move in next door to The Simpsons, causing all sorts of “we’re not cool enough” chaos for the classic TV family.

Portlandia’s hip vibe collides with ’77 grad Matt Groening’s The Simpsons in upcoming episode 

Read more on the MTV blog.