Singer and actor Melba Moore has crossed mediums, genres, and generations. Active on-stage and in studios since the mid-'60s, she broke through with a history-making Broadway role in Hair, won a Tony Award for Purlie, and was a two-time Grammy nominee all before she hit her creative and commercial stride as a recording artist. Although Moore scored a couple Top 20 R&B hits in 1976 with the effervescent disco single "This Is It" and the belting ballad "Lean on Me," both of which were Van McCoy collaborations, it was in the next decade that the four-octave vocalist truly excelle...