Harry Connick Jr.'s song "Do-Re-Mi" is a cover of the iconic song from the musical "The Sound of Music." The song is a playful and educational tune that uses the solfège system to teach the different notes of the musical scale. The lyrics of the song start with "Do," which refers to the first note of the scale, followed by "Re," "Mi," and so on until "Ti." Each note is described with a different phrase that helps the listener remember the sound and association of the note. The song also includes additional lyrics such as "A deer, a female deer" and "A drop of golden sun" which help to associate the notes with objects or concepts that are easy to remember. These lyrics also help to create a catchy and memorable melody. The purpose of the song is to teach children (and anyone else) the names of the musical notes and help them memorize the order of the scale. It's a fun and engaging way to introduce music theory and the solfège system. In Harry Connick Jr.'s rendition, he adds his own style and interpretation to the song while maintaining the playful and educational essence of the original version. His smooth voice and jazzy arrangements give the song a modern twist, making it enjoyable for listeners of all ages.