Carrie Underwood Has The Cutest New Duet Partner

My heart.

Of all the people Carrie Underwood has done duets with, her son Isaiah takes the cake as the cutest. The 18-month-old fills in for Sam Hunt on her track “Heartbeat” in this adorable video she posted on Instagram.
“This is the most beautiful sound in the world,” says the proud Mama.

See for yourself…

Audio only…my sweet boy singing his little heart out. This is the most beautiful sound in the world!

A video posted by Carrie Underwood (@carrieunderwood) on

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