The blockbuster debut of the 21-year-old Whitney, a great pop singer with the voice of a great soul singer. She could do steamy R&B like "You Give Good Love," she could do bubble-pop electro-boogie like "How Will I Know," she could do Hollywood schlock like "The Greatest Love Of All." And – this was the confusing part – she sang them all like they meant the same thing, which to her they did. Whitney had bigger triumphs ahead of her – she hit her creative peaks as a full-grown woman. But the vocal firepower of her debut changed the way pop voices emoted for the next 15 years.