Jamie Lynn Spears celebrates daughter Ivey's first birthday... amid sister Britney's mental health struggles

She's reportedly been he primary caretaker of her ill father Jamie Spears - amid reports sister Britney Spears isn't dealing with the family trauma. 

But Jamie Lynn Spears made sure all attention was on her daughter Ivey Joan Watson on Saturday, celebrating her first birthday. 

The 28-year-old beauty took to Instagram and shared an adorable picture from her rainbow themed party for her 1.5 million followers.  

Baby's special day: Jamie Lynn Spears celebrated her youngest daughter Ivey Joan Watson's birthday on Saturday with a rainbow themed party

Baby's special day: Jamie Lynn Spears celebrated her youngest daughter Ivey Joan Watson's birthday on Saturday with a rainbow themed party

'Ivey's 1st Birthday Party,' she captioned adding a rainbow and unicorn. 

Jamie Lynn was dressed in a black tee with a rainbow stripe on the top. 

The birthday girl was adorable in a multi-colored dress while her mom held up in front of her themed two tier cake.  

Jamie Lynn's photo saw a banner with the word one among various balloons, flowers and a fruit platter.

Proud mom: Jamie Lynn regularly shares adorable photos of Ivey on her social media

Proud mom: Jamie Lynn regularly shares adorable photos of Ivey on her social media 

How time flies: Earlier in the week, Jamie Lynn shared a throwback photo from when she was in the hospital about to deliver Ivey

How time flies: Earlier in the week, Jamie Lynn shared a throwback photo from when she was in the hospital about to deliver Ivey

Not in the photo was the beauty's baby daddy and husband Jamie Watson and her other daughter Maddie Briann, 10, who she shares with ex-fiance Casey Aldridge. 

Earlier in the week, Jamie Lynn shared a throwback photo from when she was in the hospital about to deliver Ivey. 

'ONE year ago today. She was still in my belly.'  

The former Nickelodeon star's post comes after it was revealed earlier in the day that her sister Britney Spears had been spotted for the first time after seeking treatment for her mental health.  

Not doing the best: The former Nickelodeon star's post comes after it was revealed earlier in the day that her sister Britney Spears had been spotted for the first time after seeking treatment for her mental health (pictured 2017)

Not doing the best: The former Nickelodeon star's post comes after it was revealed earlier in the day that her sister Britney Spears had been spotted for the first time after seeking treatment for her mental health (pictured 2017) 

Sources revealed Britney had left the treatment for some beauty care, after initially checking herself in as she wasn't coping with their father's health decline.

According to an E!, an insider spotted the 37-year-old getting her hair done in a Los Angeles salon on Thursday. 

'Britney arrived with three people from her team this morning to get her blonde roots touched up and extensions retouched,' they reported.  

The eyewitness also made it a point to add that the pop star sat with the rest of the salon clients rather than a private room.

They added: 'Several people worked on Britney's hair and were very quick and efficient to get her out of there as fast as possible.' 

Not doing well: Sources revealed Britney had left the treatment for some beauty care, after initially checking herself in as she wasn't coping with their father's health decline

Not doing well: Sources revealed Britney had left the treatment for some beauty care, after initially checking herself in as she wasn't coping with their father's health decline

Her boys: Spotted out on Thursday for the first time, sources revealed that the Lucky singer was excited to get back into her usual routine and spend some time with her sons

Her boys: Spotted out on Thursday for the first time, sources revealed that the Lucky singer was excited to get back into her usual routine and spend some time with her sons

'She seemed fine and content... [She] was definitely excited to her hair done.'

The source also mentioned that the Lucky singer was excited to get back into her usual routine and spend some time with her sons.

Britney's appearance and mental health breakdown comes after her father's health has continued to decline in recent weeks.

According to a Page Six source, the singer struggles to trust people, and 'has always relied on her dad to help her do "normal" things.'

Britney dad's worsening health triggered Britney's own recent decline, according to People.

Needs him: According to a Page Six source, the singer struggles to trust people, and 'has always relied on her dad to help her do "normal" things.

Needs him: According to a Page Six source, the singer struggles to trust people, and 'has always relied on her dad to help her do "normal" things.

A source told the site the singer became sick with worry over her father's health.

'Before he got sick, Britney was doing extremely well. But worrying about her dad has made her feel physically ill,' a source explained.

Since her father's health issues spiked, the Baby One More Time singer 'hasn't been eating well', has been neglecting her workout regimen, and is 'constantly upset.'

'As a mom, she knows she has to get better,' the insider added.

Family have been instrumental during this difficult time.

Britney's younger sister Jamie Lynn has been caring for their father, according to Us Weekly.

'She and her husband, [Jamie Watson], have been helping Jamie as much as they can. She's a caretaker, even though she's the youngest,' a source explained. 

Taking the reigns: Britney's younger sister Jamie Lynn has been caring for their father, according to Us Weekly . 'She and her husband, [Jamie Watson], have been helping Jamie as much as they can. She's a caretaker, even though she's the youngest,' a source explained

Taking the reigns: Britney's younger sister Jamie Lynn has been caring for their father, according to Us Weekly . 'She and her husband, [Jamie Watson], have been helping Jamie as much as they can. She's a caretaker, even though she's the youngest,' a source explained 

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Jamie Lynn Spears celebrates daughter Ivey's first birthday... amid Britney's mental health battle

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