Vocal Jazz is the genre that showcases the expressive power of the human voice, characterized by its improvisation, swing rhythms, and rich harmonies. Emerging in the early 20th century, it was popularized by artists like Ella Fitzgerald, Billie Holiday, and Frank Sinatra, who brought a smooth, sophisticated style to jazz singing. Vocal jazz's ability to convey deep emotion and tell stories through song makes it a beloved and enduring genre. Today, it continues to thrive, with modern singers like Diana Krall, Gregory Porter, and Norah Jones carrying its legacy forward and captivating audiences with their vocal artistry.