Emily Blunt was alleviated by the lower pressure of simply singing the song on the stage after some seriously huge movie scenes on her shoulders. In our interview, she talked about how Mary Poppins and Into the Woods were helpful in terms of her easing some nerves she used to have about singing on film. Though she did get nervous about performing in front of Christopher Walken, a giant among actors. Blunt talked more about singing âWild Mountain Thymeâ in the emotional scene with these words: