Grammy-winner and multi-platinum superstar Alicia Keys is the latest headliner announced for the 2010 Essence Music Festival set for this 4th of July weekend in New Orleans. The gifted artist joins an all-star line-up, from nine-time Grammy Award-winning singer Mary J. Blige, who is the official spokesperson of the 16th annual festival of entertainment and empowerment, to brilliant new artist Keri Hilson.