Grammy nominations got spread around this year. “In years past, a glut of nominations would push a single artist above the fold, but this year the flattened field presented more subtle story lines amid the sprawl of 104 categories. Among those themes: the musical reverberations of Sept. 11, the solidifying of rap’s stature in top categories and the heralding of a new generation of young female stars in the closely watched category of best new artist.”