Let’s hear it for Grandma and Grandpa! In celebration of National Grandparent’s Day on September 8, we’re taking a look at five famous grandparents and their joys of watching the generations grow. Garth Brooks: Country crooner Garth Brooks recently entered the grandparents club this summer when his middle daughter, 19-year-old August Anna Brooks and boyfriend Chance Michael Russell, welcomed their first child – a girl named Karalynn. Grandpa Garth, 51, has since issued a statement since his first grandchild’s birth: “Our family would first like to thank everyone for their warm wishes and sweet celebration of Baby K’s arrival,” he said. “Our children’s lives have always been extremely private and they have been endlessly…