Mariah vs. J. Lo: dueling divas

Step aside, divas. Mariah Carey is back. Big time. The figures are still being tallied, but it’s a strong bet that her new disc, “Charmbracelet,” will be the top debut on the next Billboard album chart. Estimates of first-week sales range from 200,000 to 270,000–about double what Carey managed with last year’s much-maligned soundtrack to her movie flop “Glitter.”