After "Sherry" and the swaggering "Big Girls Don't Cry" exploded from AM radios nationwide, everybody knew The Four Seasons’ trademark sound: pounding drums, energetic harmonies, and Frankie Valli's unearthly falsetto. Along with those hits, the Seasons' debut applies that sound to a wide variety of songs, including some from Broadway and the movies. Who knew that "Never on Sunday" would work so well as a big-beat rocker, or that the Tin Pan Alley standard "Yes Sir, That's My Baby" would translate to doo-wop?