Here's a viral video that deserves a round of applause.

YouTube user Jen Cardinal posted an incredible ultrasound video Thursday of her 14-week-old unborn baby "clapping along" as she and her physician sing "If You're Happy and You Know It," as her husband films.

She explained in the comments under the video, "The experience is one I'll never forget, the baby clapped three times, then the doctor rewound and scrubbed it while we sang. No mystery. It was amazing."

Watch the amazing ultrasound video below.


Explosive Gender Reveal! Watch How a Gun-Loving Couple Learned 'It's a Boy'

Veteran-Photographer Bashed for Picture of Baby Wrapped in Flag

Texas Nat'l Guard Has a Brave, Inspiring New Recruit



You might also be interested in ...

You Won't Believe Why This 4-Year-Old Rode the Bus Alone at 3 A.M.

NFL Player Says Daughter's Cancer Is in Remission

'Act of God': Boy Survives 101 Minutes Without Pulse