No one mourns the (people singing during) Wicked . It's Wicked weekend! The highly anticipated adaption of the hit Broadway musical arrives in theaters today with Cynthia Erivo as Elphaba and Ariana Grande as Glinda. The film has already received rave reviews and is quickly taking the box office by storm , meaning Wicked hype isn't likely to die down anytime soon. However, a debate is quickly brewing over one very important film-going experience: Is it OK to sing along to the musical? The