Frankie Valli, 90, marked a significant moment when ... The Four Seasons frontman is the father of six children, and is no stranger to tragedy following the tragic deaths of his stepdaughter ...

Frankie Valli has six children: Celia, Antonia ... became stepfather to Celia after he married Mandel in 1957. Celia died in February 1980 during an accident. Jersey Boys writer Rick Elice ...