Vergleiche Jazz Standards Songs and Instrumentals – Poor Butterfly (jazzstandards.com): “Although a Japanese American actress/vocalist, Haru Onuki, introduced the song, she was replaced soon after the opening by soprano Sophie Bernard.”
Vergleiche Jazz Standards Songs and Instrumentals – Poor Butterfly (jazzstandards.com): “The song was so popular that over two million copies of the sheet music were sold, and it was played and sung by almost every musical artist of the day.”