I DID NOT THREATEN TO KILL HIM - USHER'S EX-WIFE

Usher's ex-wife Tameka Foster claims she never threatened to kill the R&B superstar, but she did admit under oath to saying "I will f**k you up" ... so you can see how he might have taken it the wrong way.

Usher and Tameka have been going through a bitter legal fight  over custody of their two young children -- a fight that came to a head in a Georgia courtroom this past week.

Tameka took the stand and, as you can see in this video, was questioned by Usher's attorney about her verbal and abusive threat towards the singer -- where she allegedly said "I will kill you both," referring to Usher and his current girlfriend.

Foster went back and forth with her answer before coughing up a half-admission, saying she didn't threaten to "kill" him ... but admitting, "I did probably, out of anger, say 'I will f**k you up' and it's not acceptable."

Foster claims the menacing statement was a result of Usher gallivanting in and out of town with his new GF, which was  "embarrassing" for her in such a tight knit community.

The trial will continue next week.

I AM NOT GIVING MY EX $50,000 TO FIGHT ME - USHER

 Usher says there is noooooooo way he is going to foot the bill so his ex-wife Tameka can pay for her legal battle against him ... this according to new documents filed in their ongoing custody case.

As TMZ first reported, Tameka wants Usher to write a check for $50,000 to cover her costs as the two trade legal shots in their fight for custody of their two children.

Usher finds that request absurd... saying in court docs filed earlier this month that Tameka has consistently defied court orders and filed frivolous motions, like the one trying to force him to take a drug test.

Usher claims he's already forked over 25k for her attorneys and has shouldered the brunt of the financial associated with this case, especially when it comes to their kids.

Bottom line ... Usher feels Tameka's actions "directly harm the best interests of the minor children. Clearly, such actions should not be tolerated, much less rewarded."

A judge has yet to rule.

USHER RAYMOND FIGHTS FOR HIS KIDS

Usher and his ex Tameka Raymond are at it again. There’s been another development in the custody case involving their two children. This time the singing superstar is hitting back.

According to TMZ he’s filing his own response in the ongoing legal stoush. He wants the Judge to dismiss Tameka’s push for full custody. He says the allegations she’s made about him are completely false. The 33 year old says he’s a good Dad and should be able to see his two children. He also added he’d never cancelled his former wife’s Saks 5th avenue card either.

So what did Tameka say about the star that had him Caught Up? She claimed in a Georgia Court last month that Usher was missing in action when it came to responsible fatherhood. She said he dropped the ball as a parent in a number of ways by failing to get her permission for their kids to travel and hiring nannies without her ok.

She was also very upset about her beloved Saks 5th Avenue credit card. Usher’s ex says he closed her account. It meant she was unable to take advantage of the rewards and benefits the card offered. Tameka has asked Usher be drug tested on multiple occasions. The requests have so far been dismissed by the Court.

At the moment the former husband and wife share joint physical custody of the kids – their sons Usher Raymond V and Naviyd Ely Raymond.The trial is set for next month. It’s due to commence February 27.