Frankie Valli, with his signature falsetto voice, is an American icon synonymous with the sound of the 1960s. Born Francis Stephen Castelluccio on May 3, 1934, in Newark, New Jersey, Valli's musical journey began in a busy working-class neighborhood where he absorbed the harmonies and rhythms that would later define his sound. In the late 1950s, Valli joined forces with Bob Gaudio to form the group The Four Seasons, which quickly became one of the most successful vocal groups in American history. Their unique blend of doo-wop and harmonized pop, along with Valli's breathtaking high notes, catapulted them to fame with a string of hits like "Sherry," "Big Girls Don't Cry," "Walk Like a Man," and "Can't Take My Eyes Off You." Their success was further solidified by the hit Broadway musical and film "Jersey Boys," which chronicled their rise to stardom and the impact of their music on popular culture. The Four Seasons, alongside groups like The Beatles and The Rolling Stones, defined an era with their distinctive four-part harmonies that drew from the traditional doo-wop style. Under the songwriting partnership of Bob Gaudio and Bob Crewe, the group's music evolved to include a range of styles from rock 'n' roll to soulful ballads. Their chart-topping songs were not just radio hits but also showcased Valli's exceptional vocal range and the group's tight vocal arrangements. Valli's solo career also flourished, with albums like "Big Girls Don't Cry!: Hit Songs of the '60s" capturing his versatility as an artist. His voice, which has been praised by contemporaries and admired by subsequent generations of musicians, remains a testament to the enduring power of vocal precision and emotional expression in pop music. Frankie Valli and The Four Seasons continue to be celebrated for their timeless melodies and harmonies that have resonated with audiences around the globe for over half a century.