The Nights by Avicii is in Cb at 126 beats per minute and runs 2:50 across 47 bars. It uses 9 chords — Eb5, Db5, Cb, Gb, Dbno3, Dbsus4, N.C., Ebm, 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? The Nights guitar melody tab.