Eminem and Mariah Carey seem to have the gripe that keeps on giving. A source claims Eminem has returned to their famously contentious fling, six years ago, for unflattering material on his forthcoming album.

"There is more than one track that goes into really specific, intimate detail about what went on between Em and Mariah," an insider tells OK! magazine.

The source claims Carey has asked the head of her Island Def Jam label, L.A. Reid, to intervene.

"Mariah wishes she could sue Eminem for slander," says the snitch. "But it's his freedom of speech."

Ill will has continued to simmer between the recording stars, even though they seem to have had the briefest of affairs in 2001.

Eminem mocked Carey by releasing voice messages, said to be from her, of a woman pleading: "Why won't you see me? Why won't you call me?"

Eminem has confirmed the fling, although Carey denies it. She told Playboy earlier this year: "Something is clearly askew with him. I'm curious as to why he's so obsessed with me."