"All for Love" is a song written by Bryan Adams, Robert John "Mutt" Lange and Michael Kamen for the soundtrack " The Three Musketeers: Original Motion Picture Soundtrack". It was performed by Bryan Adams, Rod Stewart and Sting. The song was released as a CD single in the United States on November 16, 1993. It was a worldwide hit, reaching number one across Europe and North America. Using only the above description and what you know about the world, "All for Love was written by three people." is definitely correct, incorrect, or inconclusive? 