James Royce Shannon (1881–1929) was an American composer, lyricist, and performer, primarily recognized for his contributions to the early 20th-century popular music scene. He is best known for his work in the genre of musical theater and vaudeville, blending elements of ragtime and early jazz into his compositions. Shannon's notable works include songs like "My Sweetheart's the Man in the Moon" and "The Girl Who Danced with Me," which showcased his knack for catchy melodies and clever lyrics. He was also associated with the Ziegfeld Follies, a series of elaborate theatrical productions that highlighted the talents of various performers and musicians, significantly influencing American entertainment. His impact on music lies in his ability to capture the zeitgeist of the Roaring Twenties, contributing to the evolution of popular music and the development of American musical theater. Although not as widely recognized today, Shannon's work helped pave the way for future songwriters and composers, embodying the playful spirit of the era and enriching the cultural landscape of American music. His legacy is evident in the continued popularity of the genres he influenced.