For Once In My Life by Dean Martin is in Eb at 100 beats per minute and runs 3:14 across 48 bars. It uses 24 chords — Bb, Bbaug, Bb6, Eb, F7, Em7, Bdim7, Cm7, 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? For Once In My Life guitar melody tab.