“Heaven Knows” is a rock song performed by English rock singer Robert Plant. The song was written by keyboardists Phil Johnstone and David Barratt. It was released on January 18, 1988 with “Walking Towards Paradise” on the B-side as the lead single from his fourth solo album “Now and Zen.” “Heaven Knows” reached number 1 on the Billboard Album Rock Tracks chart in February 1988 for six consecutive weeks.