Mariah Carey grabs the best opening sales week of her career as her eighth studio album, "The Emancipation of Mimi" (Island/IDJMG), arrives atop The Billboard 200 with 404,000 U.S. copies, according to Nielsen SoundScan. Her first chart-topper in almost a decade ends the six-week reign of 50 Cent's "The Massacre" (Shady/Aftermath/Interscope), which falls 1-3, with sales down 15% from last week to 140,000 units.
