My 9 Favorite Moments From the Schitt's Creek Holiday Special, Which Is a Masterpiece

Who better to play the piano while Moira and David perform "The Number" than Paul Shaffer? The Canadian musician, who's best known as David Letterman's musical director, has a fun cameo in the flashback, during which he cracks a joke about Moira having a better voice than Aretha Franklin (who's also performing at the party — naturally).