Trees has higher complexity than the average song in terms Chord-Melody Tension.
About The Key Of F♯ Major
Trees is written in the key of F♯ Major.
According to the Theorytab database, it is the 9th most popular key among Major keys and the 16th most popular among all keys. Major keys, along with minor keys, are a common choice for popular songs. The three most important chords, built off the 1st, 4th and 5th scale degrees are all major chords (F♯ Major, B Major, and C♯ Major).
See the F♯ Major Cheat Sheet for popular chords, chord progressions, downloadable midi files and more!