Listen to Supercalifragilisticexpialidocious online. Supercalifragilisticexpialidocious is an English language song and is sung by Laura Michelle Kelly, Melanie La Barrie, Gavin Lee, Charlotte Spencer, Harry Stott and The Mary Poppins Original London Cast. Supercalifragilisticexpialidocious, from the album Mary Poppins (Original London Cast Recording), was released in the year 2005. The duration of the song is 4:24. Download English songs online from JioSaavn.