Some may feel Mariah Carey has the fashion sense of a 1970s porn star, but her dazzling, multi-octave voice defined '90s "diva-tude." Carey ruled the charts during the Clinton decade -- literally, her 1990 debut album alone spawned four No. 1 hit singles and set the stage for Celine Dion's less R&B/dance-oriented approach. Her albums are always expertly crafted and performed, making her MTV Unplugged EP a surprisingly warm change of pace. Carey has entered the new century rea...  [+]