Rap Sheet

By Harriet Barovick, Matthew Cooper, Autumn De Leon, Andrew Goldstein, Daniel S. Levy, Lina Lofaro, Desa Philadelphia, Chris Taylor

RAPPY BIRTHDAY Hip-hop is celebrating its 20th anniversary (Sugar Hill Gang's album Rapper's Delight was released this month in 1979). Now that hip-hop has been around for two decades, a generation gap has developed between old-school and new-school rap. How can you tell them apart? Answer: Product placement.