Section.80 is the debut studio album by American rapper Kendrick Lamar, released on July 2, 2011, under Top Dawg Entertainment. The album features guest appearances from GLC, Colin Munroe, Ashtrobot, BJ the Chicago Kid, Schoolboy Q, Ab-Soul and vocals from late singer-songwriter Alori Joh. The production was mainly handled by Top Dawg in-house producers from production group Digi+Phonics, along with THC, Tommy Black, Wyldfyer, Terrace Martin and J. Cole. The concept album features lyrical themes delivered by Lamar such as racism and medication tolerance. The album's lead single "HiiiPoWeR", was released on April 12, 2011.