Kelly Clarkson is suing her ex-husband.

The 'Stronger' singer has filed a cross-complaint against Brandon Blackstock that seeks to affirm or expand the $2.6 million award the California Labor Commission granted her last year after it was found the 47-year-old producer had charged her for business deals he wasn't licensed to seek.

But the previous judgement only covered the period up to 2017 and in documents filed earlier this week, Kelly is seeking an order that would require the return of “any and all commissions, fees, profits, advances, producing fees or other monies” which she paid to Brandon's father's company, Starstruck Entertainment, as far back as 2007.

In the complaint, the 41-year-old talk show host is suing for judicial intervention related to labour code violation, saying she believes Brandon - who has an appeal on the original rule pending - and Starstruck breached the Talent Agencies Act for the entire period of their working relationship.

Documents obtained by Rolling Stone stated: “Based on the wrongful acts and conduct of Starstruck, all agreements between the parties, should be declared void and unenforceable, no monies should be paid by cross-complainants to Starstruck, and all monies previously paid by cross-complainants to Starstruck should be disgorged from Starstruck, forthwith.”

She wants the court to order a “complete accounting” from Starstruck to determine if she’s owed more than the $2.6 million outlined in the original award.

Brandon's legal representative branded the lawsuit "morally, ethically and legally wrong".

Bryan Friedman said: “It is morally, ethically and legally wrong to attempt to get monies back from your ex-husband who not only helped her as her manager but who used those earnings on their children and Kelly and Brandon’s lifestyle during the marriage."

A spokesperson for the 'Breakaway' singer - who has River, nine, and Remington, seven, with her former spouse - has yet to comment.