Grande first delivered a moonlit rendition of “Over the Rainbow,” which Judy Garland famously sang as Dorothy in the movie “The Wizard of Oz.” Erivo then belted her version of “Home” from the 1975 Broadway musical “The Wiz,” a Dorothy number originally performed by Stephanie Mills onstage and by Diana Ross in the 1978 film adaptation.

Ariana Grande's brother, Frankie Grande, shared a video of him and his friends reacting to her Oscar's performance on Sunday.

Ariana Grande and Cynthia Erivo brought Oz to the Oscars, kicking off the 97th annual ceremony with a musical medley from “The Wizard of Oz,” “The Wiz” and “Wicked.” After a tribute to Los Angeles, which is recovering from devastating wildfires,