50 Moms And Their Kids With Down Syndrome Do 'Carpool Karaoke' For World Down Syndrome Day

They even caught James Corden's attention.

March 21 is World Down Syndrome Day (WDSD), a day that "encourages our friends all over the world to choose their own activities and events ... to help raise awareness of what Down syndrome is, what it means to have Down syndrome, and how people with Down syndrome play a vital role in our lives and communities," the official WDSD site reports

Down syndrome is the most commonly occurring chromosomal condition, and approximately 6,000 babies are born with it in the United States every year. 

To help spread awareness, 50 moms and their children with Down syndrome got together to create the most epic carpool karaoke song. 

"Introducing 50 ordinary mums and 50 ordinary 4-year-olds," it says at the beginning of a video on Wouldn't Change a Thing's YouTube channel. "With just 1 tiny connection: one extra chromosome." 

With that, the moms and their children karaoke to Christina Perri's song, "A Thousand Years," with lyrics like "Darling, don't be afraid, I have loved you for a thousand years / I'll love you for a thousand more" to tug at your heartstrings.

Additionally, the group notes that they were inspired by U.K. organization Singing Hands, "whose videos have helped many in the group learn Makaton for supporting their children's communication development. Makaton is designed to help hearing people with learning or communication difficulties using signs, symbols alongside speech."

So not only do the families in the video karaoke to the song, but some of them use Makaton, too. 

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"The video shows the unconditional love between a mother and her child, despite the Down syndrome," one of the mothers in the video, Cheryl Gibb, told TODAY Parents. "The choice of song captures exactly how we feel about our children and that our love is pure — that we see past the condition and see them for who they truly are, and think others can see this, too."

Afterward, Perri, who was contacted for permission for the use of her song, tweeted in response to the video:

Even James Corden, the creator of carpool karaoke, commented:

So far, the video has been viewed over 1.5 million times on YouTube, with people leaving their praise and enthusiasm in the comments section. 

"I don't think I've smiled as much as I have today in a long, long time," one person writes.

"One of the most beautiful things I have seen, love to you all," another adds.

"Three seconds in and I'm already crying," another writes.

The feeling is mutual.

Check it all out below:

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