Two Little Boys by Rolf Harris is in Gb at 116 beats per minute and runs 2:59 across 65 bars. It uses 15 chords — Ab, Dbm, Ab7, Db, F7, Gb, Bbm, 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? Two Little Boys guitar melody tab.