Brandon Blackstock, the late ex-husband of singer Kelly Clarkson, was a father of four. The talent manager died on August 7 after a private cancer diagnosis. Blackstock was 48 years old. “It is with great sadness that we share the news that Brandon Blackstock has passed away,

The family of Kelly Clarkson’s ex-husband, Brandon Blackstock, is beginning to speak out after his tragic death at age 48. Brandon died on Thursday, August 7, after a private, yearslong battle with cancer. His brother, race car driver Shelby Blackstock, 35, was one of the first in the family to publicly address his passing.

Kelly Clarkson's "staying strong" but is "heartbroken" for her kids after ex Brandon Blackstock's death, a source tells PEOPLE. The singer and her late ex-husband share daughter River, 11, and son Remington,