Gang Starr was an American hip hop duo, consisting of Houston-born record producer DJ Premier and Boston, Massachusetts rapper Guru. For the entirety of their association, they were based out of Brooklyn, New York. Gang Starr was at its height from 1989 to 2003, and are considered one of the best MC-and-producer duos in hip hop history. They are recognized for being one of the pioneers of jazz rap. Some of their top hits include "Mass Appeal", "Take It Personal", "Moment of Truth", "Full Clip" and "Above The Clouds".

Source: Wikipedia (https://en.wikipedia.org/wiki/Gang_Starr)