VIDEO : Carrie Underwood Posted An Adorable Photo Of Her Son Sleeping Through Concert

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 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."??