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.