That’s What I Want for Christmas by Nancy Wilson is in A at 100 beats per minute and runs 2:40 across 39 bars. It uses 27 chords — Amaj7, F#m7, Bm7, E7, E13, C#7, A13, Eb9, 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? That’s What I Want for Christmas guitar melody tab.