R&B hottie, Usher's ex Tameka Foster, is waging war against the singer by not only claiming he is violating their many provisions in their custody agreement she is asking for a drug test because she feels he gets high. Usher has REFUSED a drug test. Does that mean he's guilty, or is he just not giving in to her crazy demands? She feels that he was 'in delirium' during a January concert in Germany in which he acted in a strange manner onstage and was unable to sing. His reps said he was ill at the time. Tameka charges back:

“I dated him . . . when he’s had a very serious throat condition and he still performs like a champ,” she said. “ I really feel strongly that something was going on there, and it wasn’t, ‘Oh I have laryngitis.’ ”

She made a further claim in the deposition: “I believe he gets high. And if he doesn’t then he’d take the drug test, correct?”

This all started back in January when Usher filed for sole custody of their two sons Usher Raymond V, 4, and Naviyd Ely Raymond, 2 after Tameka refused to let him take them on his world tour.

In addition to the drug test request, she's claiming that he didn't allow her to see the boys last Christmas and that he owes $34,000 in nanny fees. 

Usher's court documents refusing the drug test claim that Tameka's allegations are: “frivolous and unfounded,” and intended to “harass and embarrass” the singer.

These two are no stranger to drama as the rumors of their tumultuous relationship are legend. 

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Photo: WENN