I Heard The Bells On Christmas Day by Casting Crowns is in Eb at 72 beats per minute and runs 4:17 across 46 bars. It uses 6 chords — Gm, Eb, Bb, D7, F, Fsus. 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? I Heard The Bells On Christmas Day guitar melody tab.