C4 (mixtape)
C4 is the third solo mixtape by American rapper Kendrick Lamar, then known as "K-Dot". It was released on January 30, 2009 through Top Dawg Entertainment.
The mixtape contains 17 tracks and includes guest appearances from Lamar's label-mates Ab-Soul, Punch, Jay Rock and BO. The mixtape was heavily inspired by Lil Wayne’s 2008 album Tha Carter III, composed mostly of freestyles over instrumentals from Wayne’s album, in addition to a number of original tracks.
