R&B singer Jill Scott will star as Mahalia Jackson in Mahalia!, an upcoming biopic of the Queen Of Gospel. Deadline reports that Queen Latifah, Jamie Foxx, Shakim Compere, and Holly Carter are producing, with Richard Hocutt, Mark Gould, and Tricia Woodgett writing the script based a biography by Darlene Donloe. The film has secured the…