What You Mean To Me by Gary Barlow is in Db at 110 beats per minute and runs 2:35 across 56 bars. It uses 12 chords — Db, Cm7, Fm7, Cm, Ab, Bbm, Eb, Gb, 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? What You Mean To Me guitar melody tab.