Cynthia Erivo talks about her three-hour-long audition for her role in Wicked, singing with Ariana Grande for the first time after landing the part and singing "Defying Gravity" live on set while flying through the air.

Ariana Grande and Cynthia Erivo might be powerful witches now, but years ago, they were simply munchkins with big dreams. And in a new Xfinity commercial that premiered Tuesday (Nov. 12), fans are reminded of the long yellow brick road both women took to make their dreams come true through being cast in Wicked,