"Chim Chim Cher-ee" is a song from Mary Poppins, the 1964 musical film, and is also featured in the 2004 Mary Poppins musical. The song won the 1964 Academy Award for Best Original Song. From Wikipedia
The final verse, written by late composer Richard Sherman, will debut on July 17, marking the first major lyrical update to the beloved attraction's theme song.