MESHELL NDEGEOCELLO A notorious perfectionist tries her hand at keeping it simple She’s sung with MadonnA and John Mellencamp, played bass with the Rolling Stones and Alanis Morissette, but Meshell Ndegeocello’s primary focus has always been her own solo work. Since getting her start playing in go-go bands in Washington, D.C., in the late ’80s, the singer, bassist and bandleader has rolled through pop, soul, funk, jazz and R&B. She made...