All hail the queen! Donna Summer has broken the curse.  For far too long, record companies have lazily saddled established artists -- black female singers, in particular -- with "covers" projects. Diana Ross, Natalie Cole, Dionne Warwick, Patti Austin, Deniece Williams, Gladys Knight, Miki Howard, Patti LaBelle, and Vanessa Williams have all released albums comprised of well-known songs...