Whitney Houston stars as Emma, the protective single mother of daughters Sister (Carmen Ejogo), Sparkle(Jordin Sparks) and Dolores (Tika Sumpter) who try to form a Motown girl group. "For me, she took on the mother role because my parents weren't there [during film production]," Sparks told the September issue of Redbook. "She was always asking, 'Did I feel comfortable? Did I need anything?' "