50 families and their children, all of whom have Down's Syndrome, have released a second online video after their first made internet history earlier this year.

The Wouldn't Change a Thing Down Syndrome awareness organisation raised awareness of the condition in March when their 'Carpool Karaoke' video to Christina Perri's 'A Thousand Years' became one of the most popular viral videos ever.

The video aimed to "create a world where negative, outdated perceptions of Down's Syndrome become a thing of the past."

It gained more than 230 million views online and made headline news all over the world. Now they have returned with a follow-up, singing a hit from 'The Greatest Showman'.

Their 'carpool karaoke' to Christina Perri's 'A Thousand Years' was shared by celebrities and news organisations all over the world. Credit: Wouldn't Change A Thing

This latest project addresses the initial fear felt by parents following a Down's Syndrome diagnosis, but showcases the joy that children with the condition bring to family life.

With the hashtag #wouldntchangeathing, "50 Mums" want to share how unique and wonderful their lives are, when there is an ever-increasing demand for screening and termination for the condition.

Watch their full interview here: