Pregnant Carrie Underwood Sings to Baby Bump, Says Body Is "Definitely Not Mine Right Now!"

Country singer also talks about baby names and whether her son likes the sound of his superstar mom's voice with Jimmy Fallon, Kathie Lee & Hoda

By Rebecca Macatee Dec 09, 2014 7:19 PMTags

Visit NBCNews.com for breaking news, world news, and news about the economy

Carrie Underwood and hubby Mike Fisher are looking forward to welcoming their first child—a baby boy—in the spring.

Sometimes, though, the 31-year-old mom-to-be can "forget" she's pregnant! "I'll just walk by a mirror...then I'll see myself and just start laughing," she told Kathie Lee Gifford and Hoda Kotb Tuesday on Today. "My body's definitely not mine right now!"

Of course, baby Fisher is never far from the forefront of Carrie's mind. The former American Idol winner told Jimmy Fallon on Monday's Tonight Show she feels "like I have to sing good all the time" because of her baby-to-be. "Like, if I'm just in my car driving, I feel like I have to make it good because he's listening," she said. "He's always in there!"

Carrie isn't sure yet that her little man likes his mama's never-ending vocals. "He hears me singing whether he would like that or not," she said with a laugh. "I mean, that's what I do! He doesn't have a choice."

Baby Fisher still has some time to decide whether he likes the sound of Carrie's voice (of course, how could he not?!). Carrie and Mike, 34, also have some time left to decide on their little one's name!

"We're constantly thinking [of baby names]," she told Kathie Lee and Hoda, adding that the couple will watch the credits at the ends of TV shows and movies for inspiration. And while the couple has done some home preparation for their baby boy, Carrie admitted, "Probably nothing will prepare us for how much our lives will really change when we become parents!"

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