From Wikipedia
“White Horse” is a 1983 crossover post-disco single written by Tim Stahl and John Guldberg of the Danish synth-pop duo Laid Back. The song was released as the B-Side of their single “Sunshine Reggae” which became a major hit in several European countries. In the U.S. the A-Side was mainly ignored and it was the B-Side that became most successful. It was released as an A-Side and went on to spent three weeks at number one on the Dance Charts.[1] The single also made the top five on the R&B singles chart and peaked at number 26 on the Billboard Hot 100. Although being played in European Clubs, it failed to chart there when re-released as an A-Side.