Article continues below advertisementReba McEntire spoke out for the first time since her late stepson Brandon Blackstock passed away on August 7, following his cancer battle at 48 years old. The dad-of-four's brother Shelby Blackstock posted a sweet message to his late sibling via Instagram. "Words cannot begin to capture the tremendous loss our family has endured. Yesterday, we lost a brother, a father, a grandfather, and a son. Brandon Blackstock was an irreplaceable part of our family-funny, bright, and full of life-and he will be deeply missed.