Kelly Clarkson abruptly cancelled her Las Vegas shows, announcing that her ex-husband, Brandon Blackstock, was ill. Then, came the tragic news that Blackstock was dead at the age of 48. What was his cause of death?

Details of Brandon Blackstock’s final days have been shared after the talent manager’s death, aged 48. A representative confirmed the news in a statement to People following the talent manager’s secret cancer diagnosis.

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,