Her song: "I'm F---ing Matt Damon." Kimmel's song of revenge, unveiled on his ABC show Jimmy Kimmel Live Sunday night immediately after the Oscars: "I'm F---ing Ben Affleck." (Watch the video here.)
"Matt, Sarah, this is for you," said Kimmel, noting that Silverman and Damon's music video has been seen by about 8 million people on ABC.com and YouTube.
And the hilarious new clip – in which the two are seen giving each other pedicures before Affleck tweaks Kimmel's bare chest – isn't just a duet: It's an all-star performance on par with "We Are the World."
When it comes to backup singers, Kimmel somehow managed to round up a who's-who of the entertainment industry, including Don Cheadle, Ashlee Simpson, Robin Williams, Cameron Diaz, Huey Lewis, Christina Applegate, Joan Jett, Macy Gray, Benji and Joel Madden, Lance Bass, Josh Groban and Harrison Ford – who blows the new couple a kiss.
Costarring Brad PittEven Brad Pitt makes a cameo, albeit in a non-singing role. He plays a FedEx deliveryman who brings a cake of congratulations to Kimmel and Affleck.
Kimmel and Affleck also stand nose to nose in the video, and all but kiss. As Robin Williams rhapsodizes, "This is not a man crush."
"The reason I did it like this, I didn't want my parents finding out from the tabloids," Kimmel said after showing the video.
Affleck said his wife, Jennifer Garner, didn't take the news very well. "Thank God my daughter is too young [to understand]," added the actor, referring to 2-year-old Violet.
Retorted a straight-faced Kimmel, "Well, she's our daughter now."