From Slashfilm.com, February 24, 2008:
Earlier this month Sarah Silverman recorded a music video announcing to the world that she”™s F**king Matt Damon (see below). Damon has long been the punchline of a running joke in Silverman”™s boyfriend Jimmy Kimmel”™s sign-off (“Apologies to Matt Damon, we”™ve run out of time!”).
As a retaliation, Kimmel has recorded a music video himself, announcing that he”™s F**king Ben Affleck! The video features cameo appearances from Brad Pitt, Harrison Ford, Cameron Diaz, Joan Jett, Macy Gray, Robin Williams, Don Cheadle, Pete Wentz, Perry Farrell, Benji and Joel Madden, Lance Bass, Huey Lewis, Josh Groban, McLovin, Meatloaf, and former announcer and Mighty Mighty Bosstones frontman Dicky Barrett.
Sarah Silverman: “I’m F*cking Matt Damon” on Jimmy Kimmel, January 31, 2008