"I'm freaking out in the best way. It's like nervous excitement, of like nervous about how this is all going to actually happen," he expressed, adding that his wife was feeling "amazing." "We already got him the little baby headphones for side stage. Got him his little denim show jacket. He's ready."
The dad-to-be also shared how they had completed his son's nursery, revealing that he built "his whole closet to hang all the cute little baby clothes and made a little shoe shelf for these little guy's [feet]…I cannot wait and we're going to have matching shoes."
"The biggest blessing in the entire world. And I don't say this often, but just how much of a blessing it is," he reflected, later adding, "I wish he was just already right here, just have him right here."
Hear more of what the country crooner told ET in the video below.