This is the true story of a quest -- the quest for a song, first, and then for the woman who wrote it. The song appears in the closing credits of "Mirror Mirror," the first of this year's two big-screen adaptations of the Snow White fairy tale. Its director, Tarsem Singh, first heard the song in the early 1970s, when he was a boy growing up in India's Punjab province. The song was called "I Believe," and it was sung -- in English -- by a woman who might best be described as the Madonna of Iran...