The 83-year-old Valli, with the unique falsetto voice, began his musical career in the 1950s in various ensembles around Newark, New Jersey.
In 1962, the Royal Teens band, of which he was a member, changed its name to The Four Seasons and became famous with a series of hits, including Walk Like a Man, Sherry, Big Girls Don't Cry, and others. Their albums have sold over 175 million copies over the years, and in 1990, they even entered the Rock & Roll Hall of Fame.
Valli launched a successful solo career in the 1960s and 1970s, during which he released the hit song, titled Can't Take My Eyes Off You and the theme song from Grease.
In recent years, Valli and The Four Seasons made a return to force after the successful Jersey Boys musical opened on Broadway in 2005, documenting their story. In 2014, the musical was adapted into a film directed by Clint Eastwood.
(Translated and edited by N. Elias)