GLADYS KNIGHT DOIN' 'BAD' WITH TYLER PERRY: Marvin Winans also joins filmmaker's upcoming movie.

     *Tyler Perry has added veteran entertainer Gladys Knight and gospel singer Marvin Winans to the cast of his latest film "I Can Do Bad All by Myself," an adaptation of his early stage play.

      In the story, Perry's iconic Madea character discovers a 16-year-old girl (Hope Olaide Wilson) and her brothers looting her home and sends them to live with their Aunt April, a hard-drinking nightclub singer played by Oscar nominee Taraji P. Henson.

       Knight will play Wilma, a matriarch of the neighborhood and singer at Marshall Baptist Church, where Madea also frequents. Knight, Winans and Blige will sing in the film, with Blige performing an original song penned by Ne-Yo, according to the Hollywood Reporter.      

       "CSI: Miami" star Adam Rodriguez has also joined the cast of the Lionsgate project, which is currently shooting at Tyler Perry Studios in Atlanta for a Sept. 11 release. Brian White, Kwesi Nii-Lante Boakye and Frederick Siglar round out the cast.      

       Knight recently made a cameo appearance on NBC's "30 Rock." She last appeared on the big screen in "Hollywood Homicide."