Happy by Pharrell Williams is in Bb at 160 beats per minute and runs 3:38 across 78 bars. It uses 7 chords — F7, N.C., Ab6, Bb, C, Dbmaj7, Cm7. 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? Happy guitar melody tab.