Anthony Ryan Leslie, known professionally as Ryan Leslie, (born September 25, 1978) 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 to Gospel. From 2005â2006, he had his most commercial success to date with NextSelection/Bad Boy/Atlantic recording artist Cassie and her single "Me & U". Leslie's debut album, Ryan Leslie (2009), features the songs "Diamond Girl," "Addiction," and "How It Was Supposed To Be." He was nominated for a Grammy in 2011.