Video for Dolly Parton and Smokey Robinson’s 1988 duet single "I Know You By Heart", originally included on Dolly's 1987 RAINBOW album. Though Dolly and Smokey look like they had a good time with the <b>song and</b> filming the clip, their fans didn't apparently share their enthusiasm, as the song was among the lowest charting singles either performer had had in their respective careers to that point.