All over Late Registration, he indulges his sentimental R&B-poet side (“Roses”), his Seventies slow-jam love jones (“Celebration”), his wit (“Gold Digger”), his hard-ass politics (“Crack Music”) and his love of Maroon 5 (“Heard ‘Em Say,” featuring Adam Levine). He calls in the heavyweights: Jay-Z, Common, Brandy, Cam’ron, Consequence, the Game, Paul Wall.