Will Ferrell Performs as Celine Dion In Her Las Vegas Show 4.88K Whitney Jefferson 10/29/10 04:12PM Filed to: The Late Show The Late Show Will Ferrell TV Musical celine dion Video At this point, it's pretty much come to be expected that when Will Ferrell pops into the Late Show, he'll stick around for a surprise musical performance (like this one.) That fact doesn't make this video any less funny.[There was a video here]