Baz Bamigboye / Deadline: Breaking Baz: Jon M. Chu On How The Breathtaking 'Wicked: For Good' Took Flight With New Songs For Cynthia Erivo & Ariana Grande, Plus A Secret Guest Star As Cowardly Lion ... Getting the film to gleam involved bringing back stars Cynthia Erivo and Ariana Grande to film new lines for the title song ...