It was agreed the pair would share joint custody of their kids, with Clarkson having primary custody.
As of this year, the pop star has reached a confidential settlement in her battle with Blackstock over the millions in commission he paid himself as her manager, according to Rolling Stone.
Despite the challenges of the split, Clarkson has remained focused on her career and children and often opens up about being a parent.
In a 2016 interview with Redbook, she said: “I have a lot of mom guilt. I was just talking about this… If you’re a mom, you want to be with your kid every day. You don’t want to miss a moment, you want her to need you and want you and not want somebody else.