![Carrie Underwood, Son, Isaiah, Jacob Carrie Underwood, Son, Isaiah, Jacob](https://akns-images.eonline.com/eol_images/Entire_Site/2019128/rs_634x789-190228085900-634-carrie-underwood-isaiah-022819.jpg?fit=inside|900:auto&output-quality=90)
Instagram / Mike Fisher
None of us will ever sound this good on helium…
Carrie Underwood‘s husband Mike Fisher posted on his Instagram page on Wednesday night a hilarious video of her singing “Happy birthday” to their eldest son Isaiah Michael Fisher, 4, after inhaling from a yellow birthday balloon filled with helium.
The 35-year-old Grammy-winning singer serenaded the boy, who looked highly amused, while holding his 1-month-old baby brother, Jacob Bryan Fisher.
“Happy birthday Isaiah!!” Mike wrote.
This weekend, Carrie and her family celebrated Isaiah’s birthday early with a Muppets-themed birthday cake.
“Ummm… @iveychildersand @iveycakestore have outdone themselves once again! Isaiah loves the Muppets and his favorite movie right now is Muppets Most Wanted,” Carrie wrote on Instagram, alongside a photo slideshow.
“He wanted a ‘most dangerous frog’ cake and he most certainly got one! And it tasted as delicious as it looked!” she added. “Thanks for making his birthday celebration extra special! #MyBestieIsABaker #IveyCake #Yum.”
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