The Middle by Zedd, Maren Morris & Grey is in G at 110 beats per minute and runs 2:37 across 66 bars. It uses 6 chords — C, G, D, Am7, Em, Am. 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? The Middle guitar melody tab.