👉 A Billie is a musical instrument that originated in the United States. It is often played on a harmonica or an acoustic guitar and is known for its distinctive sound. The name "Billie" comes from the fact that it resembles a small, round, and often pink, ball. The Billie was originally used as a folk music instrument and has been adopted by many different genres of music including rock, country, blues, and pop. It is also used in contemporary popular music with artists