According to the Guinness Book Of World Records, 'Happy Birthday To You'' is the most recognized song in the English language, followed by 'He's a Jolly Good Fellow.' The origins of the song date back to the Mid-nineteenth century. The melody comes from the song, 'Good Morning All,' written by American siblings Patty Hill and Mildred Hill. Patty was a kindergarten teacher and her sister Mildred was a pianist and composer. Interesting facts, but we want the cash!