Mary J. Blige is best known for her power-ballad vocals and soul-baring testaments to emotional devastation. But The Queen of Hip-Hop Soul's catalogue also ripples with a subtle suavity and elegance. “I'm In Love” from 1999 offers alluring quiet-storm ambience, while the piano-coaxed downtempo of head-nodder “Round and Round” and 2014's deep-house serenade “Nobody But You” bring a tasteful amount of heat.