By now, everyone knows that Sarah Silverman is f@cking Matt Damon. The girlfriend of talk show host Jimmy Kimmel made this information public via an hilarious, taunting music video.

Last night, however, we learned of a new twist in the saga: Kimmel is getting it on with Damon's best friend, Ben Affleck.

Among the celebrities that take part in the following video, touting this new relationship, are: Harrison Ford, Cameron Diaz, Don Cheadle, Robin Williams, Rebecca Romijn, Macy Gray, Pete Wentz, Josh Groban and Christina Applegate..

Brad Pitt even delivers a special congratulatory cake. Check it all out now: