Missy Elliott takes viewers “Behind the Music” on VH1. In the preview clips, the trailblazing rapper speaks about starting out in the group Sista, meeting Ginuwine and Tweet in Da Bassment, becoming friends with Aaliyah and producing her debut, rapping for Diddy, and filming the iconic video for “The Rain (Supa Dupa Fly).” Missy’s pals Mary J. Blige and Ciara also provide commentary on the episode, premiering tomorrow at 10 p.m.