Krystal Keith has been working on a big, life-changing project: She's got a baby on the way!

Keith teased a huge announcement on Tuesday (April 28) via Instagram, but she didn't give fans any ideas about what the big news would be.

"Coming Soon ... an exciting announcement about the current project I'm working on!" she wrote. "Can't wait to share it! Stay tuned ..."

Obviously since she's a country singer, most thought that the "current project" involved new music, though some correctly predicted a baby on the horizon. Still, Keith delighted fans by posting a photo of her baby bump on Thursday (April 30) and saying, "So about that project I've been working on!! We are over the moon about expecting our first little bundle of joy!!"

Keith is wearing a form-fitting dress in the photo, accentuating her baby bump, and sporting a beaming smile. The mama-to-be is already so gorgeous, but we have to admit -- pregnancy looks great on her. Clearly, she can't wait to add "mother" to her portfolio.

The singer and husband Andrew Sandubrae, who have been married since 2010, will be adding to Toby Keith's clan of grandchildren; their son or daughter will be his third grandbaby. His oldest daughter Shelley has two children.

In addition to her upcoming bundle of joy, Keith has been staying pretty busy: She made her Grand Ole Opry debut last July and opened up for her dad on his Shut Up and Hold On Tour, along with rapper Colt Ford. Her most recent studio offering was Whiskey & Lace in 2013.

Congratulations to the whole Keith family on this exciting addition!

2015's Country Music Babies