Ten voices, from Caruso to Pavarotti, that turned opera from a night at the theater into a sound the whole world could own. For three centuries, an opera singer's art vanished the moment the curtain fell.

Ten singers who understood, before almost anyone else, that in the age of MTV a song was only half the work. At 12:01 a.

Ten bands and bandleaders who, between 1965 and 1980, turned the long-playing record from a container of singles into rock's grandest canvas. Something remarkable happened to rock music in the middle of the 1960s: the album stopped being an afterthought.

Ten singers who carried gospel into the charts, turned three-minute singles into testimony, and made soul the defining American sound of the 1960s and 70s. Soul music was born when the church walked into the studio and refused to leave.

Ten voices, from the opera house to the stadium, that taught a hundred years how to sing. No century changed singing the way the 20th did.