It's symptomatic of Nicolette Larson's problems as a performer that the finest singing on In the Nick of Time is by Michael McDonald. "Let Me Go, Love," written by McDonald (with B.J. Cook Foster) and tenderly orchestrated by Jimmie Haskell, is as gorgeous and elegant a soul duet as, say, Roberta Flack and Donny Hathaway's "The Closer I Get to You." But McDonald's entrancing vocal presence—a...