The past five years have been a grand musical odyssey for singer-songwriter Tori Amos. Revered for her confessional and confrontational solo work, which has encompassed everything from intimate piano ballads to rock anthems, the American-born, Ireland-based artist branched out into orchestral settings with a seasonal album ("Midwinter Graces"), a classical song cycle drawing inspiration from famous masterworks and adding her own words ("Night of Hunters") and orchestral reinventions of her own songs ("Gold Dust"). Last year saw the arrival of her London musical "The Light Princess," and she is working on an official cast recording while on tour.