A Thousand Years by Christina Perri is in Eb at 138 beats per minute and runs 3:59 across 70 bars. It uses 16 chords — Bb, F, Gm7, Eb, Fsus, Ebsus2, Cm7, Bbmaj9, 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? A Thousand Years guitar melody tab.