Usher’s Ex-Wife Tameka Foster — Don’t Leave Me Homeless!

“s ex-wife Tameka Foster will be out on the street in less than 60 days — if Usher wants it that way, and she”s totally freaked out.

Sources tell us, the couple — who”s trying to settle a nasty custody dispute — is deadlocked in mediation, and the biggest bone of contention is Usher”s Georgia mansion.

Tameka”s currently living there — but under the divorce settlement Usher can sell the property whenever he wants … as long as he gives her a 60-day heads up.

We”re told Tameka fears Usher is going to pull the trigger — leaving her buried in legal debt with no place to live — so she”s asking him for a permanent home for her and Usher”s kids.

Usher”s response … no way, no how.  He says he”s already paid her enough.

And that”s why judges are in business.  The trial continues later this month.