Usher Raymond and Tameka Foster at Fulton County State Court on August 15, 2012 in Atlanta, Georgia. (Photos by John E. Davidson/Getty Images)

Usher and Tameeka Raymond’s fierce divorce and custody battle have been in the headlines for months. In August, Usher won primary custody of their children.

TMZ reports, Tameeka is not happy with the courts decision and has appealed on the grounds Usher’s lawyer contributed to their judge’s campaign, and the judge was therefore biased.

Usher claims the motion “constitutes a continuum of [Tameka's] vile and unsupported claims that every person who dared testify against her … is biased and tainted.”

The singer allegedly also filed a claim asking the court to deny Tameeka because her motion is ”an assault on the integrity of the court.”

There has been no ruling from the judge.

Follow Similoluwa Ojurongbe on Twitter and simioju.com