Joanna by Scott Walker is in Gb at 68 beats per minute and runs 3:28 across 46 bars. It uses 48 chords — N.C., Dbmaj7, Db6, Ab7sus4, Ab11, Ab7, Ab6, Gbmaj7, 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? Joanna guitar melody tab.