Article continues below advertisementBrandon Blackstock privately battled cancer for years before he shockingly died at age 48.In a statement shared by a rep for Blackstock's family, it was confirmed that the famed talent manager and ex-husband of Kelly Clarkson had "bravely battled cancer for more than three years" before he lost his life.Article continues below advertisementMORE ON:Brandon BlackstockKelly Clarkson's Ex-Husband Brandon Blackstock Dead From Cancer at Age 48, His Family Confirms: 'He Passed Peacefully'Ozzy Osbourne Dead at Age 76 Weeks After Performing at Final U.K.