This post deals with sexual abuse and might be triggering for some readers.

Anna "Chickadee" Cardwell, the oldest daughter of reality TV star Mama June Shannon, has died. She was 29.

Shannon, 44, announced the news on social media on Sunday morning US time.

"With breaking heart, we are announcing that @annamarie35 is no longer with us," she wrote. She passed away in my home last night peacefully at 11.12pm."

June continued: "She gave one hell of a fight for 10 months she passed away with her family around her like she won’t and we will be updating y’all with more information as we get it today."

According toTMZ, Cardwell reportedly underwent a series of tests in January after initially complaining of stomachaches, with doctors discovering she has stage 4 adrenal carcinoma. The cancer was found in Anna's liver, kidney and lung.

Her family stepped in to help look after her two kids, 10-year-old Kaitlyn and seven-year-old Kylee, while Cardwell began her first round of chemotherapy in March.

Alana 'Honey Boo Boo' Thompson also shared a tribute to her older sister.

"Anna was in so much pain last night but now as a family, we all know she is at peace now," she said.

"I really don’t know what to say as my heart is completely broken. Watching my 29-year-old sister this last year battle this horrible disease hasn’t been easy. Anna was a fighter and still is."

Watch: Mama June and Honey Boo Boo on The Doctors. Post continues below.

In January 2012, Mama June and her youngest daughter, Alana (more commonly known as Honey Boo Boo), appeared on the US reality TV seriesToddlers & Tiaras. And thanks to Alana's loud personality, the two became series regulars.

Seven months later, Mama June and her daughter had become so popular that they were given their own reality series,Here Comes Honey Boo Boo. The show ran for four seasons and gave everyone a good look into their chaotic family life.

While filming season five, the network cancelled the show after they found out Mama June was dating a registered sex offender – one who had sexually abused her eldest daughter. However, Mama June denied it.

"The statement of me dating a sex offender is totally untrue. I would not ever ever ever put my kids in danger, I love my kids too much. That is my past. I have not seen that person in 10 years and don’t seem to want to see that person," she said during a Facebook video.

Mama June's eldest daughter Anna was molested when she was eight at the hands of June's then-boyfriend Mark McDaniel. McDaniel served 10 years in prison after pleading guilty to aggravated child molestation in 2003 for abusing Anna.

From 2004 to 2016, Mama June was married to Mike "Sugar Bear" Thompson. The same year that she and Mike divorced, Mama June started dating Eugene "Geno" Doak.

In early 2019, Mama June abandoned her four daughters for her troubled boyfriend Geno.

The couple were seen living out of their car and when her children asked for her to come home and leave her boyfriend and the drugs behind, she unflinchingly chose Geno, who had an extensive criminal record including burglary, theft, and criminal damage to property charges.

In March 2019, Mama June and Geno were arrested for possession of a controlled substance and drug paraphernalia charges after police allegedly found crack cocaine and a pipe on Mama June. In September 2019, they were both charged with drug possession and pleaded not guilty.

Mama June's downward spiral was showcased on her reality TV show, which was renamedMama June: Family Crisis.

Honey Boo Boo, then 15, started living with her then 21-year-old sister Pumpkin, her husband Josh and their two kids. Mama June sold their family home for cash to support her drug habit.

"The only reason I sold the house, I was dead f**king broke," Mama June told her daughter Pumpkin on her reality TV show. "Because you know, at that point, we was doing quite a bit. I mean, it was a couple ounces a day. Our habit was $2,500 a day, if not more."

At the height of their addiction, Mama June and Geno spent $1 million on drugs.

"You're always owing somebody. You know, bank accounts overdrawn, tens of thousands of dollars, house being sold... I spent massive amounts of money," she told Access Hollywood.

"I would say the last year of our addiction, probably a good $900,000 ($1.2 million AUD)."

When their addiction was at its worst, Mama June recalled getting out $80,000 ($103,000 AUD) in one transaction for her drug dealer. Then, for her "last high" she was waiting on $15,000, but because the payment was late, she entered rehab.

In early 2020, June and Geno checked themselves into the Banyan Treatment Centre in Florida for 23 days. In August 2020, Mama June announced they were both six months clean.

"Hey guys, real quick I just wanted to jump on here. I know my birthday isn't until Monday, but I want to share this six-month blinged out chip that my manager sent me for my birthday," she said as she showcased the six-month sobriety coin in an Instagram video. "It's probably the most thing I'm proud of because now me and Geno are over si