Kelly Clarkson has postponed the remainder of her Las Vegas residency as her ex-husband contends with health issues and the pop star needs to prioritize their young family.

The 43-year-old Grammy-winning “American Idol” alum — who announced the residency in February — opened up to fans late Thursday on Instagram.

“Unfortunately, I need to postpone the remainder of the August ‘Studio Session’ dates in Las Vegas. While I normally keep my personal life private, this past year, my children’s father has been ill,” said the eponymous talk show host, referring to ex-husband and former manager Brandon Blackstock. “And at this moment, I need to be fully present for them.”

Clarkson, who wed Blackstock in 2013, said she was “sincerely sorry” to ticket-holders: “I so appreciate your grace, ki

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