Complex sentence: The Ditty Bops are a mix of jazz, swing, ragtime and musical theater headed by Abby DeWald (vocals and acoustic guitar) and Amanda Barrett (vocals, mandolin and dulcimer).
Split into simpler sentences: The Ditty Bops are a band playing a mix of jazz, swing music, ragtime and musical theater. They are headed by Abby DeWald (vocals and acoustic guitar) and Amanda Barrett (vocals, mandolin and dulcimer).