The Little Drummer Boy by Josh Groban is in D at 122 beats per minute and runs 4:13 across 72 bars. It uses 9 chords — D5, A5, G5, A7, D, Bm7, Em7, E5, 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? The Little Drummer Boy guitar melody tab.