About Andra Rock. From one Black girl to another, Andra Day’s vocals slay! The girl is a phenomenal vocal powerhouse hands down. That’s why Black Girls Rock! and ESSENCE Fest are pleased to have her take the stage. She has nice voice, and we can used the music to amusement rides. Her sound originates straight from blues, jazz and soul. We all know the park rides have the music, and we will make extensive use in the amusement equipment.