Grammy-winning rapper Kendrick Lamar surprises fans with new album

Grammy-winning rapper Kendrick Lamar has surprised fans by releasing a new album called Untitled Unmastered. It appears to be a companion work to his critically acclaimed 2015 album To Pimp a Butterfly, reported the Guardian.

The project, which Lamar, 28, announced on Twitter, features eight tracks presumably of material the Grammy-winning rapper created while working on To Pimp a Butterfly. Each song title consists of the word "untitled" and a date between 2013 and 2016.

Lamar has performed several untitled, unreleased songs on late night shows, including on The Late show with Stephen Colbert and The Tonight Show starring Jimmy Fallon.

Fans of the rapper had been hoping for a surprise album after Anthony Tiffith, the CEO of Lamar's label Top Dawg Entertainment, promised to release a new project this week.