Singer Demi Lovato just hit a major milestone: She's six months sober! To celebrate her success, she posted a piece of cake donning the number six written in chocolate on top with a note from her team. 

It also looks like Lovato got a new tattoo to (literally) mark the occasion. She posted a picture of her finger featuring a small rose tattoo with the caption "obsessed." She has a detailed history of self-harm and substance abuse, but these days she's back on track. She was just nominated for a Grammy for "Fall in Line" alongside Christina Aguilera. Demi's back, baby!

Demi Lovato is six months sober!

The singer and actress recently celebrated six months of sobriety following a near fatal drug overdose. She posted some pictures to her Instagram Story to mark the occasion. 

She treated herself to some cake.

Lovato posted a piece of an adorable cake and a note from her team on her Instagram Story. The cake even had the number six written in chocolate chips on top. Leaning against it was a note from her team: "Happy 6 mo. We are so f*cking proud of you! - Love Team DL."

And she showed off her well-deserved sobriety chip.

She got a sobriety chip that says "six months" that she posted to her Story as well. The image has a few prayer hands — a great way to remind her how far she's come. 

It even looks like she got a new tattoo.

Lovato also posted a small rose tattoo that runs down the length of her finger. The rose has a simple black outline with a long stem and what even looks like thorns. 

Lovato has a detailed history of drug abuse, which she's been open about over the course of her long career.

Lovato has been treated before for abusing substances such as cocaine. She's even quoted as saying she "couldn't go 30 minutes to an hour" without it at the peak of her dependency. She said she would sneak it in bathrooms after people went to sleep.

She has also spoken about how she used to self-harm as a coping tool.

Lovato has talked about using self-harm "to match the way [she] felt inside" in multiple interviews.

Lovato, who has been diagnosed with bipolar disorder, has used her wide influence to help others living with mental illness.

In this interview, Lovato talks about all the struggles she faced before getting a diagnosis. She talks about having a bipolar disorder and how she started Be Vocal, a mental health initiative.

In 2015, she started an initiative called Be Vocal, which is still standing strong today.

Be Vocal is all about raising awareness about mental health. Its mission is to help people take care of their own mental health and find resources for treatment. 

She even wrote a book of affirmations.

Lovato released a book called Staying Strong: 365 Days A Year. In the book, Lovato gives fans words of encouragement and strength so they can have some positive inspiration in their lives, too.

She once collaborated with Fabletics on a collection that's all about using exercise to take care of yourself.

Lovato has been open and honest about her struggles but also about the ways she heals from them. Working out is one of the ways she takes care of herself both physically and mentally.

She's always been open about how sobriety has not been easy for her.

At one point, Lovato had been sober for years, but in a song called "Sober," released just before her 2018 overdose, she revealed that she'd relapsed. In the chorus she sings:

"Momma, I'm so sorry I'm not sober anymore
And daddy, please forgive me for the drinks spilled on the floor
To the ones who never left me
We've been down this road before
I'm so sorry, I'm not sober anymore"

But thankfully, Lovato has fought substance abuse again and is "grateful to be alive."

In December, she posted in a Twitter rant that she is "sober and grateful to be alive." She said that she's taking care of herself regardless of what any media outlets had to say about it. In July of last year, she canceled tour dates to focus on her recovery.

And she's taking measures to make sure that the people in her life are truly invested in her sobriety.

In another tweet, Lovato wrote that any "source" who'd gone to the media to blab about her recovery isn't someone she wants in her life anymore. 

"Any 'source' out there that is willing to talk and sell stories to blogs and tabloids about my life isn’t actually a part of my life because most of the shit I see is soooooo inaccurate," she wrote. "So newsflash: your 'sources' are wrong."

From now on, she's going to be the only one telling her story.

Lovato doesn't look like she's happy with the tabloids poking in her business, and she wants to make sure she's the only one telling her story to the public.

"Someday I’ll tell the world what exactly happened, why it happened and what my life is like today... but until I’m ready to share that with people please stop prying and making up shit that you know nothing about. I still need space and time to heal," she said.

Clearly, all this openness and hard work is paying off — on top of all these achievements, Lovato has just been nominated for a Grammy.

Along with Lovato's other accomplishments this year, the singer is nominated for a Grammy for featuring in "Fall In Line" by Christina Aguilera. Watch the awards show on February 10 to see if she wins. We're rooting for her.

If you or a love one is struggling with substance abuse, mental illness, or considering self-harm, please visit the Substance Abuse and Mental Health Services Administration to speak with someone confidentially or find reputable information.

To call its hotline, dial 1-800-662-HELP (4357).