Judy Garland was lip syncing when she sang “Over the Rainbow” in The Wizard of Oz.  In the upcoming prequel Wicked, Ariana Grande and Cynthia Erivo sang live and were recorded for the soundtrack.  They posted a behind-the-scenes video to show you how they did it. When you hear them singing with no music, they are hearing it in hidden earpieces.  The director says they made the set with a complete recording studio.

See Wicked in theaters November 22!