Alana 'Honey Boo Boo' Thompson Shares Heartbreaking Tribute to Late Sister Anna 'Chickadee' Cardwell

"How am I even going to celebrate our birthday now 🥺🥺🥺💔," wrote Thompson in the caption of her social media tribute

Alana "Honey Boo Boo" Thompson is remembering her late sister, Anna "Chickadee" Cardwell.

On Monday, the reality star, 18, shared a heartbreaking TikTok video that featured photos of Cardwell and their family as a rendition of Benson Boone's "In The Stars" played in the background.

Before the photos appeared, a black screen shared a line from the song's lyrics: "I don't wanna say goodbye 'cause this one means forever." Thompson added in the caption, "How am I even going to celebrate our birthday now 🥺🥺🥺💔."

Fans of the Toddlers & Tiaras and Here Comes Honey Boo Boo stars first learned of Cardwell's death at age 29 through an Instagram post from their mom, Mama June Shannon, on Sunday.

Related: Anna 'Chickadee' Cardwell, Oldest Daughter of Mama June Shannon, Dead at 29: 'She Is No Longer with Us'

"With the breaking heart, we are announcing that @annamarie35 is no longer with us. She passed away in my home last night peacefully at 11:12 PM," Shannon, 44, wrote next to a family photograph. The family matriarch noted that Cardwell "passed away with her family around her" and thanked fans for their "continued prayers and thoughts."

Apart from Cardwell and Thompson, Shannon is a mom to Jessica "Chubbs" Shannon, 27, and Lauryn "Pumpkin" Efrid, 23. Cardwell was also a mom to two daughters — Kaitlyn Elizabeth, 11, and Kylee Madison, 8. Her death comes months after she was diagnosed with stage 4 adrenal carcinoma.

In an Instagram post on Friday, Shannon asked her followers to keep her family in their thoughts and included the hashtag #cancersucks. Efrid shared the heartfelt plea on her Instagram Story, adding, "Say a prayer for our family."

Related: Mama June's Daughter Anna 'Chickadee' Cardwell Married Boyfriend Eldridge Toney Following Cancer Diagnosis

After Cardwell's death, Thompson opened up about the emotions she felt while watching Cardwell's cancer journey.

"Watching my 29 year old sister this last year battle this horrible disease hasn't been easy. Anna was a fighter & still is. Lord please wrap your arms around her 2 babies & our family as the next couple of days will make this all a reality 🥹," she wrote on Instagram. Thompson also vowed to keep Cardwell's memory alive.

"We will all make sure your legacy lives on forever. And I promise to always make sure to celebrate our birthday like you never left! The sky looks a little bit different today. We will always love you Anna 💔. You hit me hard with his one Anna but I know your in a better place now and pain free forever," she added in the caption.

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PEOPLE confirmed that Cardwell married Eldridge Toney after learning of her cancer diagnosis in January. A marriage certificate obtained by PEOPLE showed that the two wed on March 4 in Wilkinson County, Georgia. The couple began dating in 2017 following Cardwell's divorce from ex-husband Michael Cardwell, with whom she welcomed daughter Kylee.

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