The singer is seen watching home movies in the clip, which appears below:
The track features on her holiday EP 'A Very Merry Perri Christmas', a six-track collection of festive songs including renditions of The Carpenters' 'Merry Christmas Darling' and Charles Brown's 'Please Come Home For Christmas'.
"I've wanted to make 'A Very Merry Perri Christmas' my whole life," Perri said in a statement.
"Christmas is so big in my family, and I've been singing these songs since I was 3 years old.
"This EP is a collection of my all-time favourite Christmas songs, plus one original, 'Something About December' which my brother and I wrote about finding Christmas wherever you are in the world, because it lives in your heart."
The set, which is produced by Grammy Award-winning David Hodges (Kelly Clarkson, Evanescence), also includes a cover of John & Yoko/Plastic Ono Band classic 'Happy Xmas (War Is Over)', as well as choral contributions from Michelle Branch, LP, Bushwalla and Boys Like Girls' Martin Johnson.
The star also features on the new Twilight: Breaking Dawn - Part 2 soundtrack, which sees her releasing a follow-up to 'A Thousand Years'.
'A Very Merry Perri Christmas' is available to download now.