Clarkson, the "American Idol" star who shared two children with Blackstock, had just announced she was stepping away from concerts to support her family.

Brandon Blackstock dealt with a private health crisis for three years before he died on Thursday, Aug. 7. In announcing his death, a representative for the talent manager and his family revealed that Blackstock,

Known as "black tumor," the cancer sends about 8,000 Americans to the grave each year — here's what you can do to avoid becoming one of them.