In September, the firm accused Clarkson of owing them $1.4 million in unpaid commissions, which resulted in an October countersuit from the "Miss Independent" singer.
At that point, Clarkson alleged that her husband and his company had actually owed her money, claiming that they defrauded her out of millions by charging her outlandish fees during throughout their contract.
According to the documents obtained by Us Weekly, Clarkson's lawyers allege that the agreement was a "fraudulent and subterfuge device" and that her managers performed "illegal services" as agents in California since they did not have a license to act as agents there.
With this claim that the company violated California Labor Code, Clarkson's lawyers have argued that she should get back all of the money Brandon earned (along with other "things of value" he might have received) from her during the 13-year period that he was her agent.
However, Blackstock's lawyers have responded that the labor code did not apply to the firm since it's a Nashville-based company.
Additionally, according to Us, the lawyers have said that there is a one-year statute of limitations in the Talent Agencies Act, meaning that he would "only be held responsible for turning over 12 months worth of earnings."