One of the buzzier titles at this year’s Toronto International Film Festival is Hidden Figures, the Space Race-era drama about three African-American women mathematicians working at NASA: Mary Jackson (played by Janelle Monáe), Katherine Johnson (Taraji P. Henson), and Dorothy Vaughn (Octavia Spencer). Saturday evening, after an emotional screening with the film’s stars, Pharrell took the stage alongside singers Kim Burrell and Lalah Hathaway to…
