This is undeniably the most adorable baby video on the internet.

We all know that there are at least two types of tears that one can shed, tears of sadness and tears of joy. Normally we see babies crying because they are angry, hurt, or otherwise upset, but have you ever seen a baby shed tears of pure unadulterated happiness?

I don't know about you, but I have not - until now.

In this video, a mother begins singing her baby a beautiful song (Sara Evans 'My Heart Can't Tell You No') and the emotional reaction from the baby is priceless!

If you ever doubted the power of music, doubt no more.

Watch this adorable baby react with emotional tears when her mom sings to her: