Robert Hunter Caldwell is an American singer and songwriter who recorded the hit single "What You Won't Do for Love" in After several R&B and smooth jazz albums, Caldwell turned to singing standards from the Great American Songbook. Robert Hunter Caldwell (born Aug) is an American singer and songwriter who recorded the hit single "What You Won't Do for Love" in Bobby Caldwell (reissued on CD as What You Won't Do for Love) is the debut album by singer and songwriter Bobby Caldwell. The album was released in on. View credits, reviews, tracks and shop for the Vinyl release of "Bobby Caldwell" on Discogs. Tracing a twenty-five year history from acclaimed soul stylist to in-demand pop and R&B songwriter, Bobby Caldwell is truly one of the most revered. The latest Tweets from Bobby Caldwell (@bobbycaldwell). Music - Singer/Songwriter. USA - NJ. Check out Bobby Caldwell on Amazon Music. Stream ad-free or purchase CD's and MP3s now on Amazon. Listen to music by Bobby Caldwell on Apple Music. Find top songs and albums by Bobby Caldwell including What You Won't Do for Love, Open Your Eyes and more. Play Bobby Caldwell on SoundCloud and discover followers on SoundCloud | Stream tracks, albums, playlists on desktop and mobile. A smooth-voiced performer whose crossover sound straddles the line between contemporary R&B, soft rock, and jazz, Bobby Caldwell has been a star since.