Kelly Clarkson’s top priority is her kids after her ex-husband Brandon Blackstock’s death. The “Since U Been Gone” singer, 43, has “been devastated” for her daughter, River, 11, and son Remington, 9, whom she shared with Blackstock, ever since their father was diagnosed with cancer over three years ago.

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,