We never considered just how powerful a song A Great Big World and Christina Aguilera's 'Say Something' was -- that is, until we watched this video of it moving a young boy to tears.

According to the parents of four-year-old Jackson, when the song came on they changed it. But then he asked that they put it back on, which they did. Suddenly, he began to cry.

"Do you want me to change the song," the father asked. Jackson shook his head 'no.' The dad then asked: "Is it a sad song?" The boy nodded.

It's a super-sweet moment that might just make you cry, too.

Baby Cries When His Mom Sings 'My Heart Can't Tell You No'