Followers were delighted with the Fletcher version, filmed at home, one even deeming it better than Idina Menzel and Michael Bublé's cover. Another complimented actress-turned-author Giovanna on the vintage sound of her voice.
Tom's videos have gathered a following across the globe, with even Gladiator star Russell Crowe praising him earlier this year. "I think he's incredibly special and I'll be very interested in whatever else he's going to do," said Russell.
This is Giovanna and Tom's first Christmas with their son Buzz
A few days ago the Fletchers were at it again this time, making up what they described as "awful Christmas songs" together in an improvisational effort.
Giovanna has been reminiscing that this time last year she was pregnant.
"I was stroking my tummy and stuffing my face with chocolate while Tom ran around the kitchen cooking the Christmas dinner, she wrote in a recent blog post for HELLO!
To celebrate his first Christmas the couple dressed their nine-month-old baby Buzz as Santa's little helper and also posted a picture of him examinging the baubles on their tree.