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 in child support.
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Usher filed for divorce from Raymond in June 2009, and they share joint physical custody of their two boys, Usher Raymond V, 4, and Naviyd Eli, 3.
However, Raymond 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 Raymond have the children for a two-week period over the summer or during the children's Christmas vacation last year.
Additionally, Raymond is requesting that a judge reconsider her allocated $5,000-a-month child support payment, as there has been a "substantial" increase in Usher's income, the documents say.
A hearing on the matter is set for Wednesday.
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