September 12, 2016 04:15 PM

Kelly Christine

Caitlyn Smith is a mom!

A rep for the country artist confirms to PEOPLE that she and her husband Rollie Gaalswyk welcomed their first child on Sunday, Aug. 7, at 4:17 a.m.

Son Thomas Miles Gaalswyk was born in Nashville, Tennessee, weighing 7 lbs., 13 oz., and measuring 21 inches.

“One month ago, he finally showed up and I kissed the top of his head and held him in my arms and I was everything I was for the last time,” Smith wrote on Instagram Wednesday next to a photo of herself snuggling her new little man.

“I was new. He is love I’ve never known — beauty I have never seen — like someone pulled a blanket off the sun. He’s changed everything.”

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The singer-songwriter, known for co-penning “Like I’m Gonna Lose You” with Meghan Trainor, has also had her songs recorded by the likes of Dolly Parton and Garth Brooks.

Smith took the time to share exclusively with PEOPLE the five things she and Gaalswyk haven’t been able to live without over the past month since Thomas’ birth.

Fisher-Price Rock ‘n Play

“Holy crap, he loves it,” she says.

Owlet Smart Sock

“It’s a heart-rate-monitor sock that lets us know he’s still breathing at night,” Smith explains. “An alarm goes off if there’s a drop in heart rate or oxygen level … it honestly helps us get way more restful sleep knowing he’s okay and we don’t have to keep checking on him.”

Kelly Christine

Baby Bjorn

“It’s so nice when going out and about to wear him close,” Smith explains. “He loves being all snuggled up.”

Milkbarn Muslin Swaddle

“They have adorable patterns, and their swaddles are big enough that they can be used a ton of other ways,” she says.

Starbucks Coffee

“Can’t function without it right now,” Smith admits.

Aside from parenting duties as a new mom, Smith has a brand new EP called Starfire, and will be releasing a full-length version of the album in 2017.

Jen Juneau

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