1. CHART BEAT BONUS

    September 06, 2002 12:00 AM EDT "Chart Beat" columnist Fred Bronson's chart-based stories on Aimee Mann, Brandy, Heather Headley, NElly, Chritina Aguilera, Enya, the Rolling Stones, the Dixie Chicks, and Sheryl Crow. MANN ACT: Her fourth solo album to chart on The Billboard 200 is the highest-charting set yet…