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Carrie Underwood

Jason Davis/Getty Images for ACM

At first glance, Carrie Underwoods tweet might be a bit concerning to hubby Mike Fisher...

"HAPPY BIRTHDAY TO ME!" the country star wrote early Tuesday morning. "My 1st present = late night date with a tiny semi-bald chubby dude who likes to grunt & cry & pass gas! #bestgiftever"

Of course, the brand new 32-year-old mama is referring to her and Mike's newborn son, Isaiah Michael Fisher! The couple's firstborn arrived Feb. 27, and on March 3, Carrie introduced her little guy to the world on Twitter, gushing, "God has blessed us with an amazing gift!"

Carrie Underwood, Isaiah Michael Fisher, Twitter


The B-Day babe's other baby—her fitness clothing line, CALIA by Carrie Underwood—actually hit shelves just last Thursday. "I've had so much fun getting to work on this," she tweeted.

Carrie's also going to have so much fun raising baby Isaiah! Motherhood is a completely new journey for the former American Idol winner, who admitted to E! News back in December, "Probably nothing will prepare us for how much our lives will really change when we become parents!"

Isaiah, on the other hand, has known mom likes to sing since he was in the womb. In late 2014, Carrie revealed on The Tonight Show Starring Jimmy Fallon that she felt "like I have to sing good all the time" because of her then baby-to-be. "Like, if I'm in my car driving, I feel like I have to make it good because he's listening...He's always in there!"

VIDEO: Carrie Underwood's top fashion tips!

Carrie Underwood, Mike Fisher

Kevin Mazur/Getty Images for TIME

"He hears me singing whether he would like that or not," she added with a laugh. "I mean, that's what I do! He doesn't have a choice!"

Hey, other babies have to listen to moms whose vocals haven't won Grammys, so we'd say Isaiah lucked out on this one. Plus, who knows? Maybe he'll inherit mom's musical prowess and be a singer himself! Then again, if he goes dad's route, mom should get ready to hit up a lot of hockey games...

There's plenty of time to figure all that out, though. In any case, Happy 32nd birthday to Carrie, and (as she cutely noted on Twitter), to Chuck Norris, too!

(E! and NBC are both part of the NBCUniversal family.)