Carrie Underwood's son, Isaiah, definitely has music in his blood — because he can sleep through a loud performance like it's nothing! Carrie posted an adorable photo to Instagram on Saturday that shows the 4-month-old snoozing on his dad Mike Fisher's lap while wearing a giant pair of headphones. Carrie, who also shared a glimpse of her postbaby bikini body [1] last month, captioned the sweet photo, "Isaiah's first band rehearsal . . . as you can see he & his daddy were totally into it! #naptime #earmuffs #sweetdreams." And this isn't the first time we've gotten to swoon over Carrie's little one. In March, the country singer posted a photo of her son holding a Nashville Predators hockey stick [2] in support of Mike, who plays for the NHL team. Mike then shared a precious selfie with Isaiah [3] in May of the two cuddling up on a bed together. See Carrie's latest photo below, then look back at her 10 years in the country spotlight [4].

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