How do you upload a Garageband song onto Facebook?

The only way to upload a song onto Facebook is by video, so this is what I recommend:

1. Create a Garageband song.
2. Convert the Garageband .pdf file into an iTunes .aac file by clicking on Export and exporting the song to iTunes. This will convert the file into an actual song available in your computer's library of music.
3. Once the song is on iTunes, drag/drop it into a movie maker, such as Windows Movie Maker or iMovie and save the file as a video.
4. Upload the video to a site such as YouTube, and copy/paste the URL onto Facebook. The song is now available for everyone to hear.
5. If you're having problems uploading, or if you get an "Uknown Error" message, don't fret! Simply go back to iMovie/Movie Maker and compress the file so that it is "streamable." This will lower the quality, but ensure that the video is succesfully uploaded.