Everybody Knows by John Legend is in Db at 84 beats per minute and runs 4:00 across 42 bars. It uses 21 chords — Ab, G, Cm7, Bm7, Db, C, Fm, 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? Everybody Knows guitar melody tab.