Dolly "was always meant to be a part of our family," Little Big Town's Kimberly Schlapman tells PEOPLE of her newly adopted baby girl

By Katie Kauss
March 02, 2017 01:45 PM
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Sometimes — not often, but sometimes — when you ask Santa for a baby sister, you get what you wish for.

That’s exactly what happened to Kimberly Schlapman‘s daughter Daisy Pearl. In early January, the Little Big Town singer shared a photo on Instagram of her family of four, announcing the arrival of their newly adopted addition Dolly Grace.

“Daisy prayed for a sibling for years,” Schlapman, 47, tells PEOPLE of her older child with husband Stephen Schlapman. “She begged us and God for years, and even asked Santa Claus this year for a sibling.”

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With her prayers answered, Daisy, 9½, is fulfilling her big-sister duties like a champ, including changing diapers — well, “the pee-pee diapers, not the other ones yet.”

In between performing at the Grammys, promoting the band’s new album The Breaker and kicking off a year-long residency at Nashville’s Ryman Auditorium, Schlapman has been relishing watching Daisy bond with Dolly.

“She’s a little mama — so helpful!” she says of her older daughter. “She’ll hold her, rock her, feed her. This is her baby doll, a real-life baby doll.”

For Schlapman, Dolly — who was named after that Dolly — “was always meant to be a part of our family. We had a little puzzle piece missing and she’s filled it up. We are ecstatic.”

Watching Daisy play mama to Dolly and grow up with confidence has been a dream come true for Schlapman.

RELATED VIDEO: Kimberly Schlapman of ‘Little Big Town’ Talks About Her Adopted Baby Girl Backstage at the ACM Awards

“[Daisy] does not know there’s anything she can’t do,” the mother of two says. “She’s such a believer in herself and it’s something that my parents tried to instill in me, but I was really shy.”

Raising her girls to be strong women has been very important to the singer, who has led by example with her own career.

“The world is [Daisy’s] oyster and I think because of my career and my husband’s support of it, she knows that a woman can be strong and make her own decisions and her own money and have her own career, and also have the love and support of a great man,” Schlapman explains.

Little Big Town’s brand new album The Breaker is now available for download.

For more about Kimberly Schlapman’s new addition, pick up the latest issue of PEOPLE, on newsstands Friday.