The Heavenly Center · CC BY 3.0

A record producer who started as a keyboardist with the Roots before becoming one of hip-hop and pop's most in-demand hitmakers in the 2000s, co-writing Dr. Dre's "Still D.R.E." and producing five Billboard Hot 100 number-one singles, including Beyoncé's "Baby Boy" and 50 Cent's "Candy Shop." He has been nominated for four Grammy Awards.