A video of a Beatles fan singing the song 'Blackbird' to his dying newborn son has now been seen fifteen million times online.

Chris Picco's wife Ashley died giving birth to their son Lennon after an emergency Caesarean section.

Lennon survived just four days before he too passed away in Los Angeles hospital.

More: Grieving father serenades dying newborn son.

In the video, dad Chris sings to his son as he lies in an incubator, playing the song on his guitar.The day after it was filmed, Lennon died in his dad's arms.

Chris Picco said: "His mum would have been so beyond joy to see him and to hold him, touch him, bathe him, sing to him - as I have had the privilege of doing."

More: How to donate to the Picco Memorial fund