[youtube]http://www.youtube.com/watch?v=XOnk07rDgfU&feature=related[/youtube] This weekend, the Essence Music Festival returns to the Superdome, and on Saturday night, LL Cool J’s on the main stage opening for Alicia Keys (who doesn’t look five months’ pregnant) on a bill that also includes Gladys Knight and Keri Hilson. Here’s an 18-year-old LL Cool J on Soul Train doing “Rock the Bells.”