Knock Madness

Knock Madness is the third studio album by American rapper Hopsin. It was released on November 24, 2013 through Funk Volume. It has so far been supported by the singles "Old Friend", "Hop Is Back", and "Rip Your Heart Out" featuring Tech N9ne.
The album debuted at #132 on the Billboard 200 and sold 4,000 copies in the United States. A week after it was released, the album rose to #76 on the Billboard 200 and sold 12,000 more copies.