If I Didn’t Have You by Billy Crystal and John Goodman is in Ab at 110 beats per minute and runs 3:51 across 79 bars. It uses 40 chords — Eb, Eb7, C7, F13, Bb13, Eb9, Ab6, Abm6, 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? If I Didn’t Have You guitar melody tab.