Usher's ex-wife Tameka Raymond has filed suit against the singer in a bid to receive full custody of their two kids and recoup $34,000 (£21,250) in child support.
The Yeah! hitmaker filed for divorce from Tameka in June, 2009, and together they share joint physical custody of their two boys, Usher Raymond V, four, and Naviyd Eli, three.
However, Tameka has now filed court papers against the star in Georgia, claiming Usher allegedly failed to complete a number of legal obligations laid out in their agreement.
According to documents, obtained by Tmz.com, she has accused him of neglecting to ask her permission before travelling with the kids outside the state and before hiring help.
The entertainer also allegedly failed to let Tameka have the children for a two-week period over the summer (11) or during the tots' Christmas vacation last year (10).
Additionally, Tameka is requesting that a judge reconsider her allocated $5,000-a-month (£3,125) child support payment as there has been a "substantial" increase in Usher's income.
A hearing on the matter is set for Wednesday (30Nov11).