If I Walk Away by Josh Groban is in Bb at 180 beats per minute and runs 3:25 across 89 bars. It uses 14 chords — F5, Dm, Am, Dm7, C5, Bb, F, Csus, 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 Walk Away guitar melody tab.