Doctor sings to each baby he delivers. Can you guess why?

The doctor's singing antics have captured the heart of many people.

As reported by ShareTap, Dr. Carey Andrew-Jaja, a doctor at the Magee-Womens Hospital of UPMC, sings to the newborns he delivers as a way of celebrating their births.

Known as the "Singing Doctor," he sings songs like Happy Birthday and It's a Wonderful World.

He reportedly delivered more than 8,000 babies over the course of his career and the first thing they hear is a song.

Dr. Andrew-Jaja, an obstetrician-gynecologist in Pittsburgh, Pennsylvania, explained that when he's singing to the babies, he's singing to an important person in the future.

That's how the doctor values their lives and the unique gifts they received. He said that he forgets about all the crisis for a moment when he sees the babies in front of him.

An elderly mentor influenced him when he was a young resident doctor at Pittsburgh’s Allegheny General.

According to Huffington Post, Dr. Andrew-Jaja told the Pittsburgh Post-Gazette in 2002 that there's a doctor who used to belts out Happy Birthday every time he delivers a newborn.

“I liked that, and I would join him and we’d both really belt it out. When he was retiring, he asked me to continue that tradition. ‘It’s all yours,’ he told me," he said.

Dr. Andrew-Jaja's video singing in the operating room went viral. The video was filmed back in 2013.

'This brought tears to my eyes,' a YouTuber wrote, as reported by Huffington Post.

Another commented that the video makes her smile and that she loves it so much.

In a 2014 interview with the Pittsburgh Tribune-Review, Dr. Andrew-Jaja said: "Everybody has their way of celebrating, this is my way of celebrating."

Dr. Andrew-Jaja received his medical degree from the University of Ibadan. He has been in practice for more than 2 decades.