Mariah Carey is really, truly concerned about rapper Eminem: "Something is clearly askew with him," she tells Playboy, "and I'm not quite sure what it is." Last year, when Carey publicly denied having had any relations with the rapper, he didn't like it – and called her a liar on the air and reserved some choice rhymes for her on his latest album, "The Re-Up." And Mariah simply doesn't understand: "I'm curious as to why he's so obsessed with me." (Uh, Mariah, you're the one still talking about him.) Adds Mimi, "I never got an apology letter, by the way... then again, I wasn't exactly searching my mailbox for it."