Carrie boasted about celebrating her big day with the guy on Twitter. "HAPPY BIRTHDAY TO ME! My 1st present = late night date with a tiny semi-bald chubby dude who likes to grunt & cry & pass gas! #bestgiftever," she posted.
Yep, she spent her birthday with her newborn son Isiah Michael. He just made his arrival on February 27.
"Tiny hands and tiny feet...God has blessed us with an amazing gift! Isaiah Michael Fisher - born February 27," Carrie posted on Twitter five days after his birth. It was accompanied by an adorable photo of baby Isaiah's hands.
Carrie's husband chimed in on her birthday celebration, posting the cutest message ever online. "Happy Birthday to the early favorite for mom of the year @carrieunderwood"
Happy Birthday, Carrie!