Poise and power from Sade

Cohesion has been the calling card of Sade, 51, who debuted with "Smooth Operator'' in 1984. Just like her songs, Sade tends to take her time. She's not in a hurry because she doesn't have to be. In a career going on 26 years (yes, "Smooth Operator'' really came out in 1984), the impossibly sophisticated