STAGE TUBE: Will Ferrell Performs as 'Celine Dion' on Late Show

Will Ferrell appeared on the "Late Show" with David Letterman, and spun a tale of his replacement for "good friend" Celine Dion, who recently gave birth to twins and is taking a break from her live show in Las Vegas.

Ferrell claims to be taking over the live show for the time being, and performs a practice rendition of "I'm Your Lady," for "Late Show" viewers.

To watch Ferrell's appearance on the "Late Show," click below.