By Breaking Celebrity News Staff

Usher's ex-wife, Tameka Raymond, denies personally accusing the R&B superstar of using drugs in the custody battle over their two sons, Star magazine has learned exclusively.

While reports indicated she'd said the A-list singer has popped pills in front of their boys -- Usher V, 4, and Naviyd, 3 -- Tameka steadfastly denies making such claims, or requesting that he take a drug test.

“I never accused him of drugs,” Tameka, who's fighting for sole custody, told Star exclusively. “My attorneys requested the test, not me. I’m merely in defense mode."