With a mom who sings likeCarrie Underwood, how could you accept anything less?

In the video, Fisher leans over his son singing Vince Gill’s “I Still Believe in You,” as Jacob grows upset and begins to loudly cry.

Underwood — who also sharesson Isaiah Michael, 4, with Fisher — then takes over, singing the same tune. Immediately, Jacob stops crying and looks over at his mom with a content look on his face.

Fisher and Underwood continue to take turns singing the song, and Jacob cries at the sound of Fisher’s voice every time — much to the delight of both parents.

“Everyone’s a critic…” Underwood captioned the footage, adding a shrug emoji.

Underwood — who tops PEOPLE’s list of100 Reasons to Love America this week— recentlyopened up about welcoming Jacob in January, and her new life with a family of four.

“He’s just this perfect little bundle of a smiley guy,” she told PEOPLE of her youngest son.

Jacob has also been joining dad Fisher and big brother Isaiah on the road for Underwood’sCry Pretty 360arena tour.

“It’s so interesting to me to think about Isaiah and how they are just going to be like, ‘Well this is normal right? Everybody’s mommy and daddy do this, right?’” Underwood said. “We’re trying to figure out how to keep them as normal as possible as well.”

Part of keeping things normal for their family involves “renting houses” instead of staying in hotel rooms while on tour and giving Isaiah his own “area” in each venue where he “can go and color… or he can read and paint, whatever he’s feeling.”

“We’ve kind of gotten out of hotel rooms because for Isaiah, it’s hard for a 4-year-old who’s constantly looking to be stimulated,” she shared. “We started renting houses to have a little more normalcy and so he has a backyard to play in. He can be a little boy and get out some of his pent-up energy. And we can make breakfast and have those comforts of home. That’s a big difference.”

For more on Carrie Underwood‘s emotional journey and 99 other great reasons to love America — which span everything from the Grand Canyon to Shark Week toMichelle Obama‘s bestselling memoir — pick up this week’s issue of PEOPLE.

source: people.com