Pregnant Carrie Underwood says she sometimes still can't believe she and husband Mike Fisher are going to be parents -- plus, she's releasing a new single Credit: Jon Kopaloff/FilmMagic

No one is more blown away by Carrie Underwood's pregnancy than Carrie Underwood herself. During an appearance on the Today show on Friday, Sept. 26, the "See You Again" singer said the good news hasn't fully settled in yet.

"It's still kinda weird, to be honest," she admitted. "Sometimes I'll be with my husband, [hockey player Mike Fisher], and it's like, I'm gonna be a mom. You're gonna be a dad. Is this real life?"

Asked what kind of parent she wants to be to her little son or daughter, the country superstar mused, "I have a wonderful mother, so if I can be even a little bit like that, we'll be good."

Underwood, 31, first announced her pregnancy on Sept. 1, with an Instagram picture of herself holding her two dogs, each of whom was outfitted in a "big sister" or "big brother" shirt. The caption read: "In honor of 'Labor' Day, Ace & Penny would like to make an announcement. Their parents couldn't be happier..."

Married to Fisher, 34, since 2010, the American Idol alum has said in the past that she'd love to have two kids — but not many more than that. "Three is fine," she told Self magazine. "Four? Somebody's getting something done, because we ain't having five!" 

Underwood also shared some big news about her career on Friday: She's releasing a new single, "Something in the Water," ahead of her first Greatest Hits album, which is set to drop on Dec. 9. 

"It's a joyous, uplifting song about changing your life," the vocal powerhouse said of the new song, out Sept. 29.