Granger Smith

Amber Smith calls her son River "our tiny, red-headed hero."

As the days on the calendar pass since the tragic death of their 3-year-old, the couple has found comfort in their heavenly Father.

"You're not going to replace the loss, ever."

He admits a part of him would like to just disappear.

"This is just the beginning," the singer vows.

River died on June 6 after an accident at the family's home in Texas.

The powerful tribute was so emotional.

This was powerful.

We're sending them all our love ...

Smith's newly released t-shirt to honor his son River has raised funds to the hospital that tried to save the child's life.