Cristina! My Life as a Blonde

''Success has very little to do with luck,'' swears the industrious star of El Show de Cristina, reportedly the most-watched TV talk show in the world (shown on Univision in the U.S.). In this warm, energetic, no-nonsense book — part memoir, part motivational treatise — the ''Oprah with salsa'' tells the impressive saga of her rise from Cuban refugee to editor in chief of the Spanish Cosmopolitan to tireless media queen. Full of amusing anecdotes, including a priceless one about Helen Gurley Brown not wearing any panties at a major corporate powwow, Cristina! My Life as a Blonde reads like a long, savvy letter from the best big sister in the world. A