The Superjam was the place to be Saturday night. After D'Angelo played a funky covers set last year (backed by Questlove and Co.), Jim James and the John Oates crew raised the stakes, performing a soul-stirring set ranging from John Lennon's "Instant Karma!" to Prince's "1999" and Sly and the Family Stone's "Higher." R. Kelly emerged for a Sam Cooke medley of "A Change is Gonna Come" and "Bring it on Home to Me." They then invited up Brittany Howard, who screamed a soul-stirring take on "Satisfaction," closest to the live Otis Redding version. Earlier, Howard took the stage to duet on Sam and Dave's "When Something Is Wrong With My Baby."