In a hilarious sendup of girlfriend Sarah Silverman's now legendary video, "I'm f-ing Matt Damon," talk-show host Jimmy Kimmel exacted revenge with his own video, "I'm f-ing Ben Affleck." One thing Jimmy has over Sarah? Sheer star wattage. A-listers Brad Pitt, Cameron Diaz, Robin Williams, Don Cheadle, Harrison Ford and musicians Joan Jett, Macy Gray, Benji and Joel Madden, Josh Groban, Huey Lewis and Meatloaf all made cameos in the music video, where Jimmy and Ben give each other pedicures and serenade each other. But will it beat the over 8 million views that Sarah and Matt's video has already gotten?