Carrie Underwood

Carrie Underwood and Mike Fisher arrive at the 54th annual Academy of Country Music Awards. Jordan Strauss/Invision via AP file

"Everybody's a critic."

The simple caption Carrie Underwood posted on an Instagram video of her new baby belies the hilarity that the footage contains.

In the Underwood-shot video, her husband, former NHL player Mike Fisher, is singing to their baby. But his voice had 5-month-old Jacob crying, and not in the pretty way his momma sings about. 

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Everyone’s a critic...🤷‍♀️ @mfisher1212 @vincegillofficial 😂

A post shared by Carrie Underwood (@carrieunderwood) on Jun 22, 2019 at 8:32pm PDT

Fisher sings Vince Gill's "I Still Believe in You" while Jacob bawls on the video until Underwood takes over the lyrics and sings a few bars of the same song. The baby's reaction, calmly looking over at mom as her beautiful voice rings out, turns back to comedic as Fisher starts singing again and Jacob's wails return.

Justin Timberlake commented: “This is the greatest thing I’ve seen all year.”

Underwood is currently on tour for her sixth studio album, "Cry Pretty."