"Wicked" fans were warned not to sing, talk or wail in a commercial played ahead of the film in theaters. AMC Theaters aired the commercial ahead of "Wicked," giving moviegoers a list of things not to do during the film starring Ariana Grande and Cynthia ...

There’s no need to flex those vocal cords 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 musical a sing-a-long — at least at AMC Theatres.