Talent manager Brandon Blackstock, the ex-husband of singer Kelly Clarkson and father of her two children, has died at 48 after a long battle with cancer, his representative said. "It is with great sadness that we share the news that Brandon Blackstock has passed away," a representative for his family confirmed to ABC News on Thursday. "Brandon bravely battled cancer for more than three years. He passed away peacefully and was surrounded by family. We thank you for your thoughts and prayers and ask everyone to respect the family's privacy during this very difficult time." Clarkson had two children -- daughter River, 10, and son Remy, 8 -- with Blackstock. Blackstock had two more children, Savannah and Seth, from a previous marriage. In 2022, Blackstock became a grandfather when his eldest

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