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Nancy Rajala, 63, of Fowlerville, Mich.

Nancy has 13 kids and 55 -- yes, 55 -- grandkids. She helps make up the first grandmother-granddaughter duo in the show's history. At 5-3 and 217 pounds, Nancy had had kept her weight in check for years -- including the births of all her children. But when her husband died several years ago,... NBC