Kelly Clarkson Opened Up About the "Hardest" Parts of Her Divorce.On Dec. 1, Clarkson had guest Glennon Doyle on her show to discuss the author’s book "Untamed," which follows Doyle’s own divorce."Glennon, you write about the fallout from your divorce — I’m obviously going through one right now," Clarkson said. .The hardest for me is the kids ... I think, as women especially, we’re trained to take it all on anddeal with it and you’re fine. But it’s your babies that you worry about, Kelly Clarkson.Clarkson shares two children with her ex, Brandon Blackstock — River, 6, and Remington, 4. .Earlier this week, she was granted primary custody of their children