Sinéad O'Connor ranked among the most distinctive and controversial pop music stars of the 1990s, the first and in many ways the most influential of the numerous female performers whose music dominated airwaves throughout the decade. Brash and outspoken -- her shaven head, angry visage, and shapeless wardrobe a direct challenge to the popular culture's long-prevailing notions of femininity and sexuality -- O'Connor irrevocably altered the image of