The melody of The Little Drummer Boy by Josh Groban runs 219 notes across 72 bars, 4:13 long in D at 122 beats per minute. The tab sits almost entirely in the first two frets, 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? The Little Drummer Boy chords and lyrics.