Will Ferrell Performs A Celine Dion Song On Letterman (VIDEO)

10/29/2010 11:13 am ET | Updated May 25, 2011

Last night on "The Late Show" David Letterman welcomed Will Ferrell to talk about his new movie "Megamind." As he does best, Ferrell didn't stick to the topic at hand and surprised everyone with a surprise performance of Celine Dion's "The Power Of Love," after claiming that he is taking over her show in Las Vegas while she takes care of her new twins. Maybe it's just us, but there's just something so right about Ferrell hanging from a stage ladder and screaming "I'm your lady" at the top of his lungs.