Introducing Mary Poppins Songtext

"Bucks and mares, cubs and does. Welcome to our show of shows. 'Tis my great honor to introduce this evening's renowned guest
The one, the only, Mary Poppins!"
"Thank you"
"Sing for us Mary Poppins"
"No. No, no, no."
"Come on have a go"
"No. I haven't sung in years."
"Please sing for us Mary Poppins. Please. Do sing for us, please"
"No, I couldn't possibly. D flat major"