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Kelly Clarkson is grieving the loss of her ex-husband, Brandon Blackstock, who lost his battle with cancer at the age of 48.

The singer is heartbroken, especially for the sake of their two children, as she navigates the emotional aftermath of his tragic death.

"Kelly remained protective of him when she found out he was sick," a source told People magazine . "She’s always kept things classy, even when it became clear earlier this year that Brandon was not doing well. She’s been devastated for the kids."

BRANDON BLACKSTOCK, KELLY CLARKSON'S EX-HUSBAND, DEAD AT 48

While their tumultuous divorce played out in the public eye, Clarkson’s focus has always been on maintaining stability for their two children -- River Rose and R

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