Harden My Heart by Quarterflash is in Bm at 120 beats per minute and runs 1:50 across 24 bars. It uses 5 chords — Bm7, G, A, Bm, Gmaj7. 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? Harden My Heart guitar melody tab.