ABC News' Daisha Riley reports:

If you're wondering how Celine Dion, the 45-year-old songstress best known for love songs like "My Heart Will Go On," and Ne-Yo, the 31-year-old songwriter-turned-R&B recording artist, came to collaborate on a new single, the answer is simple: a teenage boy.

That boy would be René-Charles Angelil, Dion's 13-year-old son.

"When I started to receive songs and I told him that Ne-Yo sent me some songs, and that maybe he would sing with me, he said, 'What? N- n- you mean the real Ne-Yo?,'" Dion told " Good Morning America" special correspondent Cameron Mathison.

For Superstar Celine Dion, Career Is a Family Affair

"He said, 'Mom, you don't even have to listen to the song. You have to do it,'" Dion said.

Dion, also the mother of twin toddler sons, listened to her oldest child and the result is "Incredible," a love song written by Ne-Yo himself.

Even though Ne-Yo, a Grammy Award-winning artist, had written songs for Dion previously, he told Mathison that the thought of singing with the Canadian songstress known for her powerful voice almost held him back.

"The issue for me, initially, was the whole concept of a duet," Ne-Yo said. "You know, it's Celine Dion."

"Once I got over the initial shock of the whole duet scenario, I'll say there were times where I was kind of battling with myself," he said. "There were one or two takes where there was something that I was looking for that wasn't there. But in the back of my mind, I'm like, 'Do I critique Celine Dion?'"

The pair recorded the song last year for Dion's new album, "Loved Me Back to Life," and reunited last Saturday, Jan. 26, in Los Angeles, to shoot the music video.

"Ne-Yo, among other artists, gave me the chance to still be the best of myself with a little bit of tweaking the sound, on a modern approach," Dion said.

Now the duo will watch as their song is played at next month's 2014 Winter Olympics in Sochi, where Dion hopes it will inspire athletes as her previous songs have done.

"For me, in the past, I remember some athletes coming to me saying that, for example, 'Love Can Move Mountains,' was their theme song before they were going to do the big jump at the Olympics," Dion said, referring to the 1992 single from her self-titled 17 th studio album.

"Ne-Yo had a vision when he wrote this song," Dion said. "And when I heard Ne-Yo's song for the first time, that piano line, and sang, 'The whole world is watching us now,' I said to myself, 'This is my new Olympic song.'"