Robert Hunter Caldwell (August 15, 1951 – March 14, 2023) was an American singer, songwriter, and musician. He released several albums spanning R&B, soul, jazz, and adult contemporary, and was known for his soulful and versatile vocals. Caldwell released the hit single and his signature song "What You Won't Do for Love" from his double platinum debut self-titled album in 1978. After several R&B and smooth jazz albums, Caldwell turned to singing standards from the Great American Songbook. He wrote... [more on Wikipedia]