Mobb Deep was an American hip hop duo from Queens, New York formed in 1991. Consisting of rappers/songwriters/record producers Prodigy and Havoc, they are considered to be among the principal progenitors of hardcore East Coast hip hop. Mobb Deep became one of the most successful rap duos of all time, having sold over three million records. Their best-known albums are The Infamous (1995), Hell on Earth (1996) and Murda Muzik (1999), and their most successful singles were "Shook Ones " and "Survival of the Fittest." They were known for their dark and hardcore delivery.