She did not use "Beautiful" as part of the ceremony, but my daughter used "As Fine As Fine Can Be" for her father-daughter dance and I had the dj use selected GL songs (as well as Dan Fogelberg, Harry Chapin and the like) for background music during cocktails and dinner. I am sure "Beautiful" was one, but I don't remember hearing it specifically.
Congrats on your anniversary Lisa. Hubby and I hit 30 next year. No Lightfoot music at our wedding, but plenty since.