The melody of That’s What I Want for Christmas by Nancy Wilson runs 316 notes across 39 bars, 2:40 long in A at 100 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? That’s What I Want for Christmas chords and lyrics.