Carrie Underwood's newborn son, Isaiah, just keeps getting cuter and cuter!

The proud new mom took to her Instagram page over the weekend to share a sweet snapshot of her husband, Mike Fisher, and their four-month-old baby snoozing during a rehearsal for Carrie's upcoming CMT Music Awards performance.

“Isaiah’s first band rehearsal… as you can see he and his daddy were totally into it!” the country superstar, 32, captioned the adorable photo of the little one wearing a pair of oversized headphones to protect his little ears.

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A few weeks ago, Mike, 35, similarly posted an image of himself cuddling in bed with Isaiah. "Me and my little man #lifeisgood," the hockey star captioned the pic posted on May 15.

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Me and my little man #lifeisgood

A post shared by Mike Fisher (@mfisher1212) on

Carrie and Mike welcomed Isaiah — their only child — on Feb. 27. The couple first met backstage at one of the "Blown Away" singer's concerts in 2008 and started dating soon after. They later married on July 10, 2010.