Wicked’ composer Stephen Schwartz opened up to PEOPLE in an exclusive interview about Ariana Grande and Cynthia Erivo doing a reworked version of 'For Good' with Idina Menzel and Kristin Chenoweth. The group performed the song during NBC’s 'One Wonderful Night' special earlier this month.

And that manifested itself in unscripted parts of what many fans will consider to be the most emotional moment of director Jon M. Chu's "Wicked: For Good:" Elphaba and Glinda's final scene together, in which they sing about how their friendship has changed them in the song "For Good."

Cynthia Erivo says she "wasn't really thinking" when she jumped in to protect Ariana Grande from a man who rushed the 'Wicked: For Good' red carpet.

Cynthia Erivo and Ariana Grande remain bonded, in sickness or in health. The stars, who play Elphaba and Glinda in Wicked: For Good, will no longer be doing interviews at the New York City premiere of the film on Monday, Nov. 17 after Erivo lost her voice earlier in the day, Universal confirms to PEOPLE.