The four seasons

In 1960, the group known as The Four Lovers evolved into The Four Seasons, with Frankie Valli as the lead singer, Bob Gaudio (formerly of The Royal Teens) on keyboards and tenor vocals, Tommy DeVito on lead guitar and baritone vocals and Nick Massi on bass guitar and bass vocals (Massi was replaced in 1965 by Charles Calello, who was in turn replaced later in 1965 by Joe Long on bass guitar and bass vocals).