Watch Noah Kahan rewrite his new song with group of 7-year-olds in 'Celebrity Substitute'

Noah Kahan was a teacher for the day on the digital series Celebrity Substitute, and what came out of it was a new version of a song he hasn't released yet.

While Noah has performed the song, "Deny Deny Deny," live multiple times, he has yet to release it. In the episode, "Mr. Noah" asks a third grade class at New York City's PS 15 what inspires them, and then incorporates their suggestions into the lyrics, retitling the song "Sky Sky Sky."

In the new song, Noah and the kids sing about homework, pets, beaches, vacations, playing, the sun and watching TV, before getting to the chorus: "We can go outside when the sun is out and it's fine/ you know today is all mine/ We can lay on our back, look at the sky, sky, sky."

"Mr. Noah's a good teacher, 'cause he's funny," says one little girl. "I became less shy today," says another.

Also in the episode, Noah plays the kids "Stick Season," swapping "applesauce" in for "alcohol." The kids ask him if he has a mansion and if he knows Billie Eilish. The answer to both those questions was "no."