Darren Billy, Jr., professionally known as Lab Ox, is an American hip-hop, R&B, Rock, R&B, Urban and pop producer from Houston, Texas. He has produced and written songs for artists and groups such as Willow Smith, Nicki Minaj, 50 Cent, Lloyd Banks, G-Unit, Drake, Yolanda Adams, and more. He is currently signed to Jay-Z's record label Roc Nation.