A smooth-voiced performer whose crossover sound straddled the line between contemporary R&B, soft rock, and jazz, Bobby Caldwell was a star after landing on both the Billboard Hot 100 and R&B charts with his 1978 hit "What You Won't Do for Love." A classic of '70s soul, the song introduced audiences to Caldwell's distinctive style, paving the way for equally sophisticated albums like 1980's Cat in the Hat and 1987's Carry On. While R&B remained a core component of Caldwell's sound, he continued to expand his approach, embracing jazz, big band, and swinging traditional pop, mov...