Blue Christmas by Elvis Presley is in Bb at 112 beats per minute and runs 2:19 across 34 bars. It uses 7 chords — F, C7, Am7, D7, Gm, G7, Bdim7. 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? Blue Christmas guitar melody tab.