You'd Be Surprised is a song written by Irving Berlin in 1919.
The first verse introduces the shy Johnny and the woman Mary who finds him to be an exceptional lover, although apparently no one else ever has. She explains his appeal in the first chorus. By the second verse, Mary's talking-up of Johnny has resulted in him now being very popular with the ladies. The song leaves any questions about Mary's status unanswered.
The song was recorded by a number of artists, including Billy Murray. Five years later, Murray would record a similar-themed tune called "Charley, My Boy", which included an instrumental referback to this one. The song was revived by Olga San Juan in the 1946 Bing Crosby/Fred Astaire film, Blue Skies. Additionally, rock band White Hassle recorded a cover of the song for their 2005 album Your Language.[1]
The song was also memorably recorded by Marilyn Monroe - with alternate lyrics. It is available on the Marilyn Monroe compilation album titled "Anthology."
Part of first verse:
Parts of various choruses:
Part of second verse: