So Fly was a song co-produced by the rapper who began her career with what R&B group?
So Fly (213 song):  The song was produced by Spike & Jamahl and Missy Elliott. Missy Elliott:  Elliott embarked on her music career with all-female R&B group Sista in the early 1990s and later became a member of the Swing Mob collective along with childhood friend and longtime collaborator Timbaland, with whom she worked on projects for Aaliyah, 702, Total, and SWV.
Sista