EXCLUSIVE: The televised catfight between Star Jones and NeNe Leakes won't officially begin until the new season of 'Celebrity Apprentice' premieres March 6, but insiders have already told me that it gets so ugly that Star had to hire her own security detail.

"NeNe is coming unhinged," a source close to Star tells me, adding that during taping the Atlanta 'Housewife' made La Toya Jackson cry and even got in the face of singing legend Dionne Warwick.

But it's her beef with Star that is particularly nasty, my source reveals. "Clearly, she can't get along with women, especially other black women. She is losing it."