Annie's Song is one of John Denver's most popular and heavily requested songs. The story goes that he wrote it in about 10 minutes while on a ski lift, at a time when his marriage was getting a bit rocky. The song apparently managed to save it, for a little while. The melody and harmony are based on a theme by Tchaikovsky, which features a descending bass line similar to Bach's Air On A G String and A Whiter Shade Of Pale. This lesson stresses hitting the bass notes accurately while quickly moving through some barre chords. It includes multiple ways of playing the song, including a Campfire Version which I would call Level 4, an Arpeggio Version which would be Level 5, and a more random fingerstyle version, in the manner that John Denver played it, probably level 6.