Cynthia Erivo and Ariana Grande are good to go in "Wicked." You, on the other hand, will need to hold off on singing until you exit the movie theater.

Ahem, ‘Wicked” moviegoers. There’s no need to flex those vocal chords ahead of going to the movie theater this week. Break out your best pink ensemble. Paint yourself green. But resist the urge to make watching the film adaptation of the Broadway ...