Heartbreak Warfare by John Mayer is in A at 100 beats per minute and runs 4:22 across 54 bars. It uses 12 chords — A5, Dsus2, F#m7, A, Dmaj7, Fmaj7, Cmaj7, 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? Heartbreak Warfare guitar melody tab.