Trouble by Cat Stevens is in Bb at 120 beats per minute and runs 2:39 across 33 bars. It uses 7 chords — C, F, Gm, Bb, G, Eb, D. 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? Trouble guitar melody tab.