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Multiple sources tell PEOPLE that Kelly Clarkson was absent from her talk show earlier this year due to her ex Brandon Blackstock's illness

The musician also confirmed on Aug. 6 that she was postponing dates of her Las Vegas residency to spend time with their children, River, 11, and Remington, 9, due to Blackstock's health

Clarkson missed episodes of her talk show beginning in March

Kelly Clarkson 's absence from her talk show, The Kelly Clarkson Show , earlier this year is being explained.

Multiple sources tell PEOPLE that the Grammy-winning performer, 43, missed several episodes of her talk show, The Kelly Clarkson Show , earlier this year largely due to her ex-husband Brandon Blackstock 's illness.

On Aug. 6, Clarkson revealed she is postponing dates of h

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