One half of comedy's most hardworking power-couples, Sarah Silverman, has been unfaithful. Out of respect for her partner Jimmy Kimmel, host of NBC's Saturday Night Live, she decided the best way to inform the said presenter of her affair was a full-on song and dance routine broadcast nationally. Discreet? You don't have to be discreet when you're bonking Matt Damon. To view Kimmel's response, follow this URL:http://www.youtube.com/watch?v=7m0WNNeCgys.