I Want You To Know by Zedd is in C at 130 beats per minute and runs 3:58 across 87 bars. It uses 10 chords — Am, C, F, N.C., Am7, G, Dm7, Em, 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? I Want You To Know guitar melody tab.