Carrie Underwood's Reflection residency at Resort World Theater in Las Vegas is back in full swing this week. But before returning to the Vegas stage for March through October dates, Underwood had some very important business to attend to back home in Nashville.

On February 27, Underwood's son, Isaiah Fisher, turned 9 years old (we can hardly believe it!). Isaiah is Carrie's oldest child, whom she shares with husband Mike Fisher, and he's a proud big brother to Carrie and Mike's second child Jacob. The whole Fisher crew celebrated Isaiah on his big day with a birthday party at a martial arts studio with an extravagant cake to match.

"Today we got to celebrate our sweet Isaiah turning 9!!!! Oh, how time flies... we got to party doing one of his favorite things...taekwondo! So fun to see the kids learning some new things. And what an amazing cake from @iverycakestore !!! It was as yummy as it was cool!," Carrie shared on Instagram.

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Fan rushed to the comments section to wish young Isaiah a happy birthday and gush over his impressive cake. "Wow! That's a cool cake!! Happy birthday to Isaiah" and "Oh wow! How is he 9 already??? Happy birthday to him!," fans wrote. "So sweet of you to share this business with your fans. I'm sure it'll really help those amazing baker out!" and "That cake topper 😂🙌," others chimed in.

The cake features a realistic topper made to look like Isaiah in his taekwondo uniform. The base of the cake features edible taekwondo belts and the logo of the ATA Martial Arts studio along with Isaiah's name. Now that Carrie is back in Las Vegas performing, we're sure these sweet family memories are on her mind while her boys are back home busy with school and extracurriculars. Happy Birthday, Isaiah!

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Maggie Horton
Associate News Editor

Maggie Horton is the Associate News Editor at Country Living. She covers all things entertainment from celebrity news to TV shows and movies. When she's not posting to social media, researching the latest celebrity gossip or binging the hottest new TV series, you can find her at a local concert or outside enjoying nature.