It is the video that will put at your heartstrings like no other - a baby girl moved to tears as her mom sings to her.

In the video, 10-month-old Mary-Lynne Leroux reacts to her mother, Amanda, singing the song "My Heart Can't Tell You No."

At first little Mary-Lynne smiles, then her eyes well up - and a single tear runs down her cheek.

It just gets more emotional from there.

This is one video you're going to want to watch.