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Leah Messer's Daughter Adalynn Wears Giant Pink Sombrero as Family Celebrates Her 11th Birthday

The youngest of Messer's three daughters was all smiles on her special day

<p>Leah Messer/Instagram</p> Adalynn (L), Leah Messer (R)

Leah Messer/Instagram

Adalynn (L), Leah Messer (R)

Leah Messer has a pre-teen on her hands!

The Teen Mom: The Next Chapter star, 31, celebrated with friends and family as daughter Adalynn Faith turned 11 on Sunday.

The birthday girl wore a big smile and a pink sweater with a matching oversized sombrero in the set of photos Messer shared on Instagram.

"Happy 11th Birthday, Addie! We love you🎊," the proud mom wrote.

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Related: Leah Messer Shares Photo of Daughter Adalynn on Her First Day of Fifth Grade: 'Happy Girl'

Messer shares Addie with ex Jeremy Calvert. She is also mom to 14-year-old twin daughters Aliannah Hope and Aleeah Grace, whom she shares with ex Corey Simms.

Speaking with PEOPLE last year, Messer talked about soaking up the pure "joy" she gets from seeing her three girls "grow and blossom."

"My greatest joy is just laughing together, seeing that foundation I set up for them come to fruition and seeing how everything I learned is implemented in what I've built," she shared.

"These girls are becoming everything that I wanted them to be, but more, everything that they want to be, using those tools. They're the best, an even better version of me."

In June, the reality star spoke with Teen Vogue about breaking her family's generational trauma. While discussing what she would tell her younger self, Messer revealed that she would teach her teenage self more about sex education.

"No shame or guilt," she said, noting that she has regular safe-sex talks with her kids. "Just open conversation. When asked a question by them, I answer honestly."

According to a study by the BioMed Central Pregnancy and Childbirth, teenage pregnancy can be linked to many factors, including a family history of teenage pregnancy. Messer, her mother, and her grandmother all had teenage pregnancies, but Messer doesn't think the pattern will continue with her daughters.

"It's the little things, like booking their first gynecologist appointments together next year and having these open conversations about them ... that I think will be enough to break the cycle," the reality TV star said. "I love them no matter what their journey may be, but I do want more for them and I always will."

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