Ever wonder exactly who "the friend" is dishing the dirt on celebrities? Well, in the case of the Rielle Hunter-John Edwards scandal, we know exactly who it was: the memorably-named Pigeon O'Brien. And now, she's explaining why, exactly, she went to the Enquirer, broke their affair, and effectively ended his political… Read… 3/03/11 1:03pm 3/03/11 1:03pm