[youtube] http://www.youtube.com/watch?v=lu1YnRaKIBk[/youtube] The Essence Music Festival starts Friday at the Louisiana Superdome, and there are a couple of late additions to the lineup, one of which is Ledisi, who plays the McDonald’s Superlounge Sunday at 11:15 p.m. after Doug E. Fresh, who plays at 9:30. Here she is singing “Turn Me Loose.”