Billie Eilish crashes Cynthia Erivo's interview as she chats with ET's Kevin Frazier and Nischelle Turner at the 96th annual Academy Awards, airing on ABC. The two singers share a big hug, then Cynthia opens up about wearing Elphaba green on the red carpet. She says she's 'really excited' for fans to see 'Wicked,' and recalls working on set with Ariana Grande. Plus, she reveals she got to hear Ariana's new album, 'Eternal Sunshine,' before it was released.