1. Search online music stores or streaming services. Some of the more popular ones include Spotify, Apple Music, and Amazon Music.
2. Look for the album titled "The Mighty Clouds of Joy Sing Christmas." This album contains the song "Silent Night."
3. You can also purchase a physical copy of the album. This option is available at some music stores and online retailers.
4. If you can't find the album, you can try contacting the Mighty Clouds of Joy's record label. They may be able to provide you with a copy of the song.