They've melted the hearts of the nation on a number of occasions now, but when the parents and children from the Wouldn't Change a Thing charity returned to This Morning today, viewers couldn't hold back their tears as they performed Michael Buble's version of 'All I Want for Christmas'.
The adorable children, who all have Down's syndrome, were joined by Michael Bublé himself in the stunning video for the new track, leaving show host Rochelle Humes and many viewers at home crying their eyes out.
At the start of the video, Canadian singer and Mr Christmas himself Michael Bublé, said, "When I heard that Wouldn't Change a Thing had chosen one of my songs to sign to, I was really moved by it. It's absolutely beautiful, check it out"
The video shows 25 different families with children with Down's syndrome signing to the stunning song with home-made videos, as well as a little cameo from This Morning hosts Phillip Schofield and Rochelle Humes.
Check out the adorable video below:
After the video aired, viewers of This Morning took to Twitter to express their love for the children, with many revealing it left them very emotional.
One user wrote, 'This is Beautiful @thismorning made me cry amazing well done to all involved #AllIWantForChristmas #Buble #raising awareness of downs syndrome', with another adding, 'Absolutely AMAZING .... this needs to be the Christmas No1 xx wishing you all a fabulous Christmas 😘😘😘😘😘'. [sic]
Another viewer added, 'Wow that touched the heart 💓. Just amazing xx'. [sic]
See what was Christmas Number 1 the year you were born:
Closer Christmas number 1 the year you were born slider
1 of 401952
Al Martino - 'Here in My Heart'
2 of 401953
Frankie Laine - 'Answer Me'
3 of 401954
Winifred Atwell - 'Let's Have Another Party'
4 of 401955
Dickie Valentine - 'Christmas Alphabet'
5 of 401959
Emile Ford and The Checkmates - 'What Do You Want to Make Those Eyes at Me For?'
6 of 401958
Conway Twitty - 'It's Only Make Believe'
7 of 401957
Harry Belafonte - 'Mary's Boy Child'
8 of 401956
Johnnie Ray - 'Just Walking in the Rain'
9 of 401960
Cliff Richard and The Shadows - 'I Love You'
10 of 401961
Danny Williams - 'Moon River'
11 of 401962
Elvis Presley - 'Return to Sender'
12 of 401963
The Beatles - 'I Want to Hold Your Hand'
13 of 401964
The Beatles - 'I Feel Fine'
14 of 401965
The Beatles - 'Day Tripper/We Can Work It Out'
15 of 401966
Tom Jones - 'Green, Green Grass of Home'
16 of 401967
The Beatles - 'Hello, Goodbye'
17 of 401968
The Scaffold - 'Lily the Pink'
18 of 401969
Rolf Harris - 'Two Little Boys'
19 of 401970
Dave Edmunds - 'I Hear You Knocking'
20 of 401971
Benny Hill - 'Ernie (The Fastest Milkman in the West)'
21 of 401972
Little Jimmy Osmond - 'Long Haired Lover from Liverpool'
22 of 401973
Slade - 'Merry Xmas Everybody'
23 of 401974
Mud - 'Lonely This Christmas'
24 of 401975
Queen - 'Bohemian Rhapsody'
25 of 401976
Johnny Mathis - 'When a Child is Born'
26 of 401977
Wings - 'Mull of Kintyre/Girls' School'
27 of 401978
Boney M - 'Mary's Boy Child/Oh My Lord'
28 of 401979
Pink Floyd - 'Another Brick in the Wall (Part 2)'
29 of 401980
St. Winifred's School Choir - 'There's No One Quite Like Grandma'
30 of 401981
The Human League - 'Don't You Want Me'
31 of 401982
Renée and Renato - 'Save Your Love'
32 of 401984
Band Aid - 'Do They Know It's Christmas?'
33 of 401985
Shakin' Stevens - 'Merry Christmas Everyone'
34 of 401986
Jackie Wilson - 'Reet Petite'
35 of 401987
Pet Shop Boys - 'Always on My Mind'
36 of 401988
Cliff Richard - 'Mistletoe & Wine'
37 of 401989
Band Aid II - 'Do They Know It's Christmas?'
38 of 401990
Cliff Richard - 'Saviour's Day'
39 of 401983
The Flying Pickets - 'Only You'
40 of 401991
Queen - 'Bohemian Rhapsody/These Are the Days of Our Lives'
Back in March this year, the Wouldn't Change a Thing organisation released a viral video titled '50 Mums 50 Kids 1 Extra Chromosome', to help mark World Down's Syndrome Day on the 21st March.
The video, which showed children with Down's Syndrome and their parents performing Christina Perri's hit song 'A Thousand Years', touched the hearts of the nation and helped raise awareness of Down's syndrome.
The video has now received over five million views, check it out below:
The NHS state that Down's syndrome, also known as Down syndrome or trisomy 21, is a 'genetic condition that typically causes some level of learning disability and certain physical characteristics.' The genetic condition happens as a result of an extra chromosome.
The Wouldn't Change a Thing charity is now asking for people to make their new Christmas video go viral, in an attempt to raise more awareness of Down's syndrome.