India, Aug. 7 -- Kelly Clarkson has announced that she is postponing the remainder of her Las Vegas residency to be with her children amid her ex-husband Brandon Blackstock's illness.

"Unfortunately, I need to postpone the remainder of the August Studio Session dates in Las Vegas," Clarkson wrote in an Instagram post.

The statement continued: "While I normally keep my personal life private, this past year, my children's father has been ill and at this moment, I need to be fully present for them. I am sincerely sorry to everyone who bought tickets to the shows and I so appreciate your grace, kindness and understanding."

Clarkson did not disclose further details about Blackstock's condition. The singer shares two children with him - daug...