 Both " Happy Working Song " and " That 's How You Know " also pay tributes to past Disney songs . " Happy Working Song " pays a lyrical homage to such songs as " Whistle While You Work " ( Snow White and the Seven Dwarfs ) , " The Work Song " ( Cinderella ) " A Spoonful of Sugar " ( Mary Poppins ) and “ Making Christmas ” ( The Nightmare Before Christmas ) , and a musical homage to the Sherman Brothers ( with a self @-@ parodic " Alan Menken style " middle eight ) . " That 's How You Know " is a self @-@ parody of Menken 's compositions for his Disney features , specifically such big production numbers as " Under the Sea " ( The Little Mermaid ) and " Be Our Guest " ( Beauty and the Beast ) . To achieve this , Schwartz admitted he had to " push it a little bit further in terms of choices of words or certain lyrics " while maintaining " the classic Walt Disney sensibility " . However , Menken noted that the songs he has written for Disney have always been " a little tongue @-@ in @-@ cheek " . As the film progresses , the music uses more contemporary styles , which is heard through the adult ballad " So Close " and the country / pop number " Ever Ever After " ( sung by Carrie Underwood as a voice @-@ over ) . 
