The Four Seasons are an American rock band that became internationally successful in the 1960s and 1970s. Since 1970, they have also been known at times as Frankie Valli and the Four Seasons. In 1960, the band 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 electric bass and bass vocals. On nearly all of their 1960s hits they were credited as the 4 Seasons.
The legal name of the organization is the Four Seasons Partnership, formed by Gaudio and Valli, and was taken after a failed audition in 1960. While band members have come and gone, Gaudio and Valli remain the band's constant (with each owning fifty percent of the act and its assets, including virtually all of its recording catalog). Gaudio no longer plays live, leaving Valli as the only member of the band from its inception who is touring as of 2021.
The Four Seasons were one of only two American bands (the other being the Beach Boys) to enjoy substantial chart success before, during, and after the British Invasion. The band's original line-up was inducted into the Rock and Roll Hall of Fame in 1990, and joined the Vocal Group Hall of Fame in 1999. They are one of the best-selling musical groups of all time, having sold an estimated 100 million records worldwide.