Other than reducing me to mush when I hear/sing it, what is also great about this song is that it fits in the Tenor register juuuuust right.

“A Thousand Years” is a heartfelt pop ballad in the key of B♭ major, with a moderate tempo around 139 BPM (often felt in a flowing 6/8 or 3/4 time). It opens intimately with delicate piano arpeggios and Christina Perri’s soft, emotive vocals, building gradually through verses and choruses with lush string arrangements and subtle percussion for a swelling, cinematic emotional arc. Her vocal range spans F3 to C5, delivering vulnerable yet soaring melodies that emphasize tenderness and longing.