Anthony Ryan Leslie Ryan Leslie (born September 25, 1978, in Washington, D.C.) is an American record producer, multi-instrumentalist, rapper, entrepreneur, and singer. Founder of the media company NextSelection Lifestyle Group, Leslie has produced singles for a number of artists in a variety of genres ranging from R&B/Hip-Hop to Pop (Pop music) to Gospel. From 2005-2006 he had his most commercial success to date with NextSelection/Bad Boy (Bad Boy Records)/Atlantic (Atlantic Records) recording artist Cassie (Cassie (singer)) and her single "Me & U". Leslies debut album, Ryan Leslie (Ryan Leslie (Album)) (2009), features the songs "Diamond Girl (Diamond Girl (song))," "Addiction (Addiction (Ryan Leslie song))," and "How It Was Supposed To Be."