Philadelphia artists have had a prominent national role in popular music. In the 1970s, Philadelphia soul influenced the music of that and later eras. On July 13, 1985, Philadelphia hosted the American end of the Live Aid concert at John F. Kennedy Stadium. The city reprised this role for the Live 8 concert, bringing some 700,000 people to the Ben Franklin Parkway on July 2, 2005. Philadelphia is home to the world-renowned Philadelphia Boys Choir & Chorale, which has performed its music all over the world. Dr. Robert G. Hamilton, founder of the choir, is a notable native Philadelphian. The Philly Pops is another famous Philadelphia music group. The city has played a major role in the development and support of American rock music and rap music. Hip-hop/Rap artists such as The Roots, DJ Jazzy Jeff & The Fresh Prince, The Goats, Freeway, Schoolly D, Eve, and Lisa "Left Eye" Lopes hail from the city.

Name a type of music from the 70's that influenced the nation?