Are you feeding your self doubt? Viv Groskop talks to writer Isabel Allende about how women can combat insecurity by celebrating each other. She talks of the value of feeling comfortable in your skin, knowing what you want to say and understanding that: "these people have come here to love you". Oh, and realising that she is not, after all, a flamboyant bitch.   Isabel's new book, The Soul of a Woman is out now. Viv's book, Lift As You Climb is too. @vivgroskop