Frankie Valli was in what band with former Royal Teens keyboard and tenor vocalist?
Frankie Valli: Frankie Valli (born Francesco Stephen Castelluccio; May 3, 1934) is an American singer, known as the frontman of The Four Seasons beginning in 1960. The Four Seasons (band):  In 1960, the group 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.
Four Seasons