The recently Grammy nominated (for his song "i") Kendrick Lamar dropped by The Colbert Report to perform an unreleased song called "Untitled". Set to a jazzy beat, it starts out slow, almost like spoken word, then moves into the hard-hitting style he's known for. K-Dot's flow is is backed up by fellow artists Bilal, Thundercat, Anna Wise and Terrace Martin. The performance marks the final musical appearance on Stephen Colbert's show, which will air its last episode on December 18. Lamar is currently working on his sophomore album, which is expected to come out sometime next year. Keep your fingers crossed for new music soon and check out the performance of "Untitled" below.