Brantley Gilbert and wife Amber welcomed their second child—a girl named Braylen Hendrix Gilbert—on Sept. 9 at Piedmont Hospital in Athens, Ga. Braylen, who joins older brother Barrett, 22 months, in the Gilbert household, weighed 6 lbs., 7 oz., and measured 19.5 inches. “Happy….Healthy….Blessed,” said Brantley, in part, via Twitter. Happy…. Healthy…. Blessed…. Thanks @people….…