And baby makes six.

Country singer Jessie James Decker posted an Instagram video on Tuesday revealing she's expecting her fourth child with husband Eric Decker.

"Good morning ☀️," Decker wrote on a video where she walks onto a balcony overlooking palm trees and what appears to be a California vista. She's wearing a sports bra and underwear with her baby bump on display. Mariah Carey's "Always Be My Baby" provides the soundtrack to the video.

The Deckers are already mom and dad to sons Forrest Bradley, 5; Eric "Bubby" Jr., 8; and daughter Vivianne Rose, 9.

The country singer has been open about her husband's reluctance to get a vasectomy and told People last fall, "Honestly, we're not trying to have a kid —we're also not, not trying to have one."

 "We're not planning on it, so we're just letting lives happen," she explained. "And if it happens, it's a blessing. If it doesn't, it wasn't meant to be, but we're not doing anything to not make it happen."

Her famous friends flooded the comments section of her post, offering their congratulations.

Jana Kramer, who is also pregnant, said: "Congrats mommma!!!!!!!!!"

Raelynn said: "CONGRATS!!!!"

Jenna Paulette added: "YAYYYYY! ❤️"

Little Big Town's Karen Fairchild offered: "Congrats!!!!!"

And Alyssa Bonagura said: "IM SO EXCITED!!!! ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️"

The news comes on the heels of another project Decker has been cooking up – her new cookbook, "Just Eat." Decker is a New York Times bestselling author in addition to being a country singer, and the book is touted as, "More Than 100 Easy and Delicious Recipes That Taste Just Like Home." Pictures indicate the book features everything from salads and pastas to cakes and cocktails. 

"Just Eat" is available for preorder now.