Who You Love by John Mayer featuring Katy Perry is in A at 150 beats per minute and runs 3:12 across 86 bars. It uses 6 chords — E, A, D, C#m7, F#m7, Bm7. 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? Who You Love guitar melody tab.