Darren Billy Jr.

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 including Willow Smith, Nicki Minaj, 50 Cent, Lloyd Banks, G-Unit, Drake, and Yolanda Adams. He was the 1st producer signed to Jay-Z's record label.

Lab Ox got his start in the record business with 50 Cent as a producer on former G-Unit and now G-Note Records artist Hot Rod's demo project. On August 17, 2007, he produced a diss record which 50 Cent released, aimed at Lil Wayne, entitled Part Time Lover. The record would later be featured on the mix-tape Sabrina's Baby Boy, the last in the "G-Unit Radio" mix-tape kil kil[.