Kendrick Lamar took the rap world by surprise Thursday night and made everyone temporarily forget about any other rap release when he dropped "untitled unmastered", a mysterious project with 8 untitled tracks. It's his first release since last year's Grammy-winning To Pimp a Butterfly. untitled unmastered. demands a close listen, both lyrically? with sharp statements on racial politics ? and sonically, with a unique blend of hip-hop, R&B, jazz, soul and funk.