Although he achieved stardom with the Black Eyed Peas and continues to lead that Grammy-winning, chart-topping pop-rap group, will.i.am has built an extensive parallel body of work as a solo artist and in-demand producer that is remarkable on its own. As he does in a group context, the Los Angeles native applies to his varied concurrent efforts a positive, fun-loving outlook and a deep multi-cultural background in hip-hop, classic and contemporary Latin styles, and club music ranging from disco to rave to EDM. Lost Change (2001) and Must B 21 (2003), his first two solo albums,...