Watch: Carrie Underwood sings ‘Happy Birthday’ to son.. with a twist

An Oklahoma county music superstar is celebrating her eldest son’s birthday, but she did a twist on the usual ‘Happy Birthday’ song.

In a video posted to Instagram, Carrie Underwood can be seen singing ‘Happy Birthday’ to her son, Isaiah, after breathing in a bit of helium from a balloon.

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Happy birthday Isaiah😂!!

A post shared by Mike Fisher (@mfisher1212) on

Isaiah just turned 4-years-old and celebrated with a ‘Muppets Most Wanted’ party.

Underwood and husband Mike Fisher recently welcomed their youngest son, Jacob, to the world last month. 

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