Demi Lovato has battled addiction to drugs and alcohol for years, and has been open about her troubles.
Just weeks after revealing she'd fallen off the wagon in soul-baring track Sober, the 25-year-old star has been rushed to hospital with what is believed to be a heroin overdose.
According to reports in the US, she was found unconscious at her home in the Hollywood Hills just before noon on Thursday and rushed to a local hospital.
"LAPD and LAFD responded to a medical emergency at the 8000 block of Laurel View Dr. at 11:40 a.m," law enforcement told People magazine.
A representative for the Los Angeles Fire Department added that they "transported a 25-year-old female patient to a local hospital."
TMZ, who broke the story, say she is currently being treated, but that her condition is unknown, however, People magazine say she is "okay and stable".
Confident hitmaker Demi, 25, has fought addiction and substance abuse for years, and has been open about her battles and her stint in rehab.
It was originally reported that Demi had suffered a suspected heroin overdose, but sources "extremely close" to the star have since told The Blast that they're adamant she was not using the drug.
The website also said that Demi's aunt had revealed she was "awake and responsive".
Demi's addiction and how she did cocaine for the first time aged 17
Demi has admitted in the past that she took cocaine for the first time when she was just 17 years old.
The Cool For The Summer singer said it was all down to being bullied at school.
She started partying in a bid to fit in with her peers, and says that drinking escalated to drugs.
And despite saying her mother warned her that cocaine would stop her heart, she "did it anyways".
She once said: "I loved it. I felt out of control with the coke the first time that I did it."
Demi also said she had wanted to know more about her father's addictions.
She said: "I guess I always searched for what he found in drugs and alcohol because it fulfilled him and he chose that over family."
The pressures of being a teenage role model
Demi rose to fame on Disney Channel, starring in original movies Camp Rock and its sequel alongside the Jonas Brothers, before landing her own show, Sonny With A Chance.
And it's after that that her team said she was beginning to feel the pressure of being a teenage role model.
Nick Jonas once spoke about how he thought he'd helped Demi get back on the wagon, but later realised he hadn't at all.
Demi didn't stay sober after rehab
Demi entered rehab in 2010, but she didn't stay sober after she left.
She once opened up about how she used to sneak drugs and described the two months following her treatment as a "bender".
She said: "I wasn’t working my program. I wasn’t ready to get sober.
"I was sneaking [drugs] on planes, sneaking it in bathrooms, sneaking it throughout the night. Nobody knew."
The star admitted taking a cocktail of cocaine and Xanax that one night, made her think she was about to overdose.
Her manager at the time said he could recall her doing interviews about her sobriety when she was high, and calling in specialists to help deal with her addiction.
It's also said that Demi went through 20 different 'sober companions' as she'd sneak drugs under their watch and became volatile.
Demi also said she'd lie about taking drugs and fake tests with other people's urine.
She said: "I’d lie straight to their faces,” she says. “It’s embarrasing to look back at the person I was."
Demi is still battling an eating disorder
Demi has also battled an eating disorder for many years.
The star said she had managed to go three years without purging while she was in a relationship with Wilmer Valderrama.
But she believes the relapse of her disorder was brought on by the breakdown of the relationship in 2016.
She once said: "When I feel lonely, my heart feels hungry and then I end up bingeing.
"And I don’t know how to figure out how to be alone."
Demi's struggles with an eating disorder began when she was still in school and subjected to bullying.
She said her disorder began as the result of a group of "pure f***ing evil" girls at her school starting a campaign to get her to kill herself.
She said: "Food is still the biggest challenge in my life. I don’t wanna give it the power to say that it controls my every thought, but it’s something I’m constantly thinking about."
Why Demi has 'Stay Strong' tattooed on her wrists
In 2011, Demi had the words 'Stay' and 'Strong' tattooed on her wrists to stop herself from self-harming.
She said that the tattoos were there to remind her to stay positive after her time in rehab and her issues with bulimia and self-harming.
She once said: "The message is for me. It says ‘Stay Strong.’ So every day no matter if I’m putting on my shoes or putting on my makeup, I see it every day, to stay strong."
Demi had the tattoos inked over the top of visible scars on her wrists that show where she used to cut.
She said: "It was very symbolic for me to be able to be able to cover that up and also replace it with something else that’s permanent so that I’ll never be able to forget the support that I had when I went in [to treatment]."