The group’s unmistakable identity was built on two pillars: the soaring, powerful falsetto of lead singer and the songwriting genius of keyboardist Bob Gaudio

What set The Four Seasons apart from their contemporaries? It was the . In an era dominated by the smooth crooning of acts like The Four Tops, Frankie Valli’s voice was a piercing instrument that cut through the static of AM radio.

Rounding out the classic lineup were on guitar and Nick Massi on bass. Together, they forged a sound that was a unique blend of doo-wop, pop, and R&B. They didn't sound like the polished studio bands of the early 60s; they sounded like the streets—rough around the edges but polished by tight, screaming harmonies.