Carrie Underwood kicked off the new year by chilling with her family while getting ready to deliver her second child. The country superstar posted a photo to Instagram on Tuesday (Dec. 1) in which she shows off her bare baby bump, letting her three-year-old son, Isaiah, rest his head by his unborn younger brother while they relax.

"Kicking off 2019 right...Me and my boys cuddled up watching a movie," the 35-year-old singer writes to accompany the black-and-white photo above.

"Yes, I’m wearing Mike’s shirt," she admits, adding the hashtag #LettingItAllHangOut.

Baby Underwood Is Here!

Underwood announced she and husband Mike Fisher are expecting their second child on Aug. 8 as part of the same video in which she announced the dates for her upcoming 2019 Cry Pretty Tour 360, which is set to launch in May. She revealed the baby is another boy during the CMA Awards broadcast in November.

Relive Carrie Underwood's Best Baby Bump Pictures:

A source recently told People the couple were "cherishing" their last Christmas with Isaiah as a family of three, and Underwood has been documenting quite a bit of their downtime together, sharing another photo of her and Isaiah cuddling, as well as an adorable video of him and Fisher helping her tie her shoes. Fisher also shared a shot of the family in matching Christmas onesies.

The family recently moved, and with Underwood's due date fast approaching, “Carrie is on lockdown until the baby [is born],” the source told People, adding that they "have the hospital route mapped out.”

Underwood delayed the tour in support of her current album, Cry Pretty, so that she could get back into shape after giving birth, and she plans to take her newborn with her when she hits the road in May.

Watch: What to Expect Now That Carrie Underwood Is Expecting

It's Been Another Big Year for Country Babies! Check It Out!