Tameka-Usher Raymond's Ex-Wife- LOSES CUSTODY WAR

According to TMZ- Usher's ex-wife Tameka Raymond just lost in the former couple's bitter custody battle --  a judge has awarded Usher primary custody of their two sons as Usher broke down in tears in an Atlanta court -- after his ex-wife's attorney insinuated he cares more about partying than he does about his children.

Usher was on the stand for hours in his ongoing custody trial with his ex Tameka Foster -- and during questioning, Tameka's lawyer whipped out photos of the singer partying in Europe in February.

Usher's fighting for more custody with his kids -- but Tameka's lawyer was trying to prove he'd rather go wild at a nightclub than be a good dad. more drama after the cut...

Usher was also grilled about his alleged drug use. The singer admitted to smoking pot in the past, but when the subject turned to his alleged ecstasy use Usher's lawyer objected.

Usher insisted he never used drugs in front of the children -- an allegation Tameka made early in their custody fight -- but hedged on the subject of seeing his children while under the influence.

It's a shocking development -- considering both sides were trying to strip each other of custody. Tameka felt the singer was an absentee father who was too absorbed in his career to be a good dad. She also accused him of using drugs in front of the kids.

Usher argued Tameka was inattentive and irresponsible.

The ruling marks the end of an emotional custody trial -- involving wild accusations and name-calling ... Usher even broke down at one point on the witness stand.

Apparently with all the display, a judge sided with the singer -- awarding Usher primary custody of the ex-couple's two sons, which means the children will be spending the majority of the time with their father.

Tameka still retains some custodial rights -- but the extent to which Tameka will be able to see her kids is unclear.