Kelly Clarkson postpones Las Vegas residency due to ex-husband Brandon Blackstock’s illness: What we know yahoo.comBrandon Blackstock, Kelly Clarkson’s ex-husband, dies at 48 after battle with cancer: What we know yahoo.comBrandon Blackstock and Blake Shelton’s Relationship Explained Us WeeklyKelly Clarkson’s ex-husband Brandon Blackstock dead at 48 after cancer battle CNNKelly Clarkson Was Absent from Her Talk Show Earlier This Year Due to Ex Brandon Blackstock’s Illness: Sources People.com