Much of the previous official publicity surrounding his career used 1937 as the birth year. Valli never addressed the issue himself, until the 2007 posting at the Official Frankie Valli Site, sponsored by his current record label, Universal Records. Valli's birth year has been called into question. Until he could support himself with music, he worked as a barber. One of his early favorite singers was 'Texas' Jean Valli, from whom he adopted his stage name. He was inspired to take up a singing career at the age of seven after his mother took him to see the young Frank Sinatra at the Paramount Theater in Manhattan, New York City. His father, Anthony Castelluccio, was a barber and display designer for Lionel model trains his mother, Mary Rinaldi, was a homemaker and beer company employee. Valli was born Francesco Stephen Castelluccio, on May 3, 1934, to an Italian family in the First Ward of Newark, New Jersey he was the eldest of three sons. Valli, Tommy DeVito, Nick Massi and Bob Gaudio – the original members of the Four Seasons – were inducted into the Rock and Roll Hall of Fame in 1990 and the Vocal Group Hall of Fame in 1999. As a solo artist, Valli scored number-one hits with the songs ' My Eyes Adored You' (1974) and ' Grease' (1978). Valli's recording of the song ' Can't Take My Eyes Off You' reached number two in 1967.

As a member of the Four Seasons, Valli's number-one hits include ' Sherry' (1962), ' Big Girls Don't Cry' (1962), ' Walk Like a Man' (1963), ' Rag Doll' (1964) and ' December, 1963 (Oh, What a Night)' (1975). Valli scored 29 top 40 hits with the Four Seasons, one top 40 hit under the Four Seasons alias the Wonder Who?, and nine top 40 hits as a solo artist.

He is known for his unusually powerful lead falsetto voice. Francesco Stephen Castelluccio (born May 3, 1934), better known by his stage name Frankie Valli, is an American singer, known as the frontman of the Four Seasons beginning in 1960.

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