An update to a Dirty story we told you about yesterday: Mariah Carey and Nick Cannon separated back in May -- and are living apart.

Divorce lawyers have been negotiating a property settlement and custody agreement for months and the divorce is "a done deal." Mariah and Nick have been living in separate houses in NYC since May. He sees the kids but that's the extent of their contact.

Sources say Nick's appearance on an L.A. radio show in March was the beginning of the end. Nick played "name the 5 celebs you've slept with". The one that made Mariah insane was Kim Kardashian.

Mariah felt humiliated, and the relationship never recovered. It went from bad to worse when Nick admitted (to Howard Stern) that Mariah did not "give it up" before they got married. She went nuclear.

Mariah feels Nick has abandoned her by taking every gig that's on the table, when they don't need the money. She's especially angry because it keeps him away from their kids.

For Nick's part, he feels Mariah has become impossible because she surrounds herself with "yes men." He says she can't handle it when he dares to disagree with her.

Source: TMZ