Song for a Friend by Jason Mraz is in Bm at 100 beats per minute and runs 5:10 across 90 bars. It uses 11 chords — Bm, A6, Gmaj7, Em7, F#sus4, Em9, A, G, 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? Song for a Friend guitar melody tab.