Aug. 7 (UPI) -- Singer-songwriter Kelly Clarkson has canceled this month's concerts in Las Vegas to spend time with her children as their father, her ex-husband Brandon Blackstock, battles an undisclosed illness.

"Unfortunately, I need to postpone the remainder of the August Studio Session dates in Las Vegas," Clarkson announced on social media Wednesday.

"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."

The couple were married from 2013 through 2022 and share an 11-year-old daughter, River Rose, and 9-year-old son, Remington Alexander.

Unfortunately, I need to postpone the remainder of the August Studio Session dates in Las Vegas.