You Light Up My Life by Debby Boone is in Bbm at 95 beats per minute and runs 2:28 across 45 bars. It uses 16 chords — Bbm, Eb, Ab, Fm, Gm7, C7, F7, G, 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? You Light Up My Life guitar melody tab.