You can play along with the video!
"Button Up Your Overcoat" is a popular song. The music was written by Ray Henderson, the lyrics by B.G. DeSylva and Lew Brown. The song was published in 1928, and was first performed later that same year by vocalist Ruth Etting. However, the most famous rendition of this song was recorded early in 1929 by singer Helen Kane, who was by that time at the peak of her popularity. Kane's childlike voice and Bronx dialect eventually became the inspiration for the voice of cartoon character Betty Boop (most famously using Kane's famous catchphrase Boop Boop a Doop). (wikipedia)
A video for this song: