Rumors have circulated that Madonna, recording artist, will sing with M.I.A. at the Super Bowl. Nicki Minaj is also implicated. Both artists have had success, but can either bring back the monoculture? Leaving the fleeting sensation of a Lynn Hirschberg truffle-fry ambush aside, if M.I.A. were interviewed by Barbara Walters, who would care? Neither M.I.A., a self-consciously “edgy” singer of extraordinary gifts of curation, nor Nicki Minaj, a self-consciously outré rapper of extraordinary gifts full-stop, have cultivated personae beyond “hardworking,” “talented,” and (in M.I.A.’s case) “prone to ignorable political pronouncements.” It’ll be a good show, but no one should expect an iconic moment on par with Madonna heaving in a [...]