Until they came back together to sing the Wicked‘s part one closer, "Defying Gravity." While Ariana watched in amazement, seeing Erivo soar, nailing those final notes, as did the audience. The performance earned a standing ovation.

At the Dolby Theatre in Hollywood on Sunday, the two Oscar-nominated stars treated audiences to a musical history of Oz onstage and onscreen. Grande first delivered a moonlit rendition of “Somewhere Over the Rainbow,” which Judy Garland famously sang as Dorothy in the movie “The Wizard of Oz.”

The duo who star in the hit musical based on the Broadway play sang from 'The Wizard Of Oz', 'The Wiz' and 'Wicked'.