Los Angeles [US], October 29 (ANI): Ariana Grande and Cynthia Erivo, the stars of Jon M. Chu’s upcoming musical ‘Wicked Part 1’, have given fans a sneak peek of their powerful vocals in a behind-the-scenes clip. The short 11-second video features the duo singing the iconic song “Defying Gravity,” and their impressive voices have already left fans excited. The clip shared by makers on Instagram, quickly went viral. Apart from the clip, a new featurette was also released, showing behind-the-scenes moments from the movie. The cast, including Grande, Erivo, and Jonathan Bailey, spoke on the import…