Overly Dedicated (stylized O(verly) D(edicated) and often referred to as O.D.) is the fourth mixtape by American hip hop recording artist Kendrick Lamar, released September 14, 2010, via Top Dawg Entertainment. The album features guest appearances from Dash Snow, Jhené Aiko, Schoolboy Q, Ab-Soul, Ash Riser, Dom Kennedy and MURS, among others. The album's production was handled by several TDE in-house producers, including King Blue, Sounwave, Tae Beast and Willie B; other producers such as Tommy Black, Drop, Jairus "J-Mo" Mozee, and Wyldfyer, also contributed production. As of October 2012, the mixtape has sold a total of 12,000 copies.