Readers' Poll: The 10 Best Hip-Hop Songs of the 1990s

In the late Eighties, N.W.A kicked off a gangsta-rap revolution that launched the careers of the Nineties' biggest solo stars (Dr. Dre, Ice Cube) and created a template for the new sound of hip-hop. The decade's hefty roster of rap luminaries ranges from certified icons like Tupac and Biggie to novelty acts such as Vanilla Ice, but across...