Untitled Unmastered is a compilation album by American rapper Kendrick Lamar. It was released on March 4, 2016, through Top Dawg Entertainment, Aftermath Entertainment and Interscope Records. It consists of previously unreleased demos that originated during the recording of Lamar's third studio album To Pimp a Butterfly (2015), continuing that work's exploration of politically charged and philosophical themes, as well as its experimentation with free jazz, soul, avant-garde music, and funk styles.