In addition to his legendary music career, Frankie Valli is a father of six. The Four Seasons frontman first became a father figure in 1957 when he married ex-wife Mary Mandel, who shared daughter Celia with a former partner. Valli and Mandel later welcomed two more children together before they divorced in 1971. Valli went on to marry Mary Ann Hannigan. After eight years together, the pair separated, and Valli moved on with Randy Clohessy. The twosome welcomed three sons before they ultimately split in 2004. The Grease singer has also weathered his fair share of tragedy.