Belief by John Mayer is in Gm at 100 beats per minute and runs 3:03 across 46 bars. It uses 9 chords — Dm, Gm7, Bb, Gm, C7, F, Bbmaj7, Am, 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? Belief guitar melody tab.