Wake Me Up! by Avicii is in Bm at 120 beats per minute and runs 3:42 across 50 bars. It uses 7 chords — Bm, G, D, Asus, A, F#7, N.C.. 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? Wake Me Up! guitar melody tab.