Carrie Underwood is expecting a baby boy

He said: "Remember last time when I accidentally revealed the gender of your baby?"

Carrie replied: "I mean, who could ever forget #Bradblewit?"

Brad then joked that Carrie's husband Mike Fisher - with whom she has three-year-old son Isaiah - may not be the father of her unborn baby.

He said: "Tonight we're going to reveal something even more exciting.

"Who the father is ... Mike we're all rooting for you buddy. What's your gut feeling? Seriously, Carrie give me a little baby hint. Johnny or June? Keith or Nicole? Garth or Trisha? Tim or Faith? George or Tammy? Waylon or Willie?"

Carrie then replied: "Oh my gosh, Willie! It's a Willie!"

Following the announcement, Carrie put on a stunning performance of her hit 'Love Wins' at the ceremony.

She was accompanied by a choir who made heart signs with her hands during the final moments of the song.

Carrie recently admitted her second pregnancy is "harder" than the first time around.

She said: "It's definitely different than the first time. When they say every pregnancy is different, it really is. Just different symptoms.

"I feel like this one is just a little harder on my body for some reason. But it's been really good."

Carrie and Mike have picked out a name for their little one, but are keeping the moniker under wraps for now.

She said: "We have picked out a name, but we're keeping that to ourselves right now."