An Old Fashioned Christmas by Carpenters is in Eb at 90 beats per minute and runs 1:53 across 34 bars. It uses 41 chords — Ebm6, F, Bb, F7, Cm, Gm7, C7, G7, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? An Old Fashioned Christmas guitar melody tab.