Step 1 : Introduction to the question "Which song has generated the most revenue in royalties?"
...“Happy Birthday to You” is the highest-earning song of all time, generating an estimated $50 million in royalties. The melody dates back to 1893, when it was originally composed as “Good Morning to All” by Patty Smith Hill, a kindergarten teacher, and her sister Mildred J. Hill. According to the Guinness Book of World Records, “Happy Birthday to You” is the most recognized song in the English language, followed by “For He’s a Jolly Good Fellow.” Today, the song is in the public domain, meaning it can be freely sung anywhere—from private celebrations to public performances—without restriction.
