The US media have reported that Demi Lovato is in an LA hospital after a suspected drug overdose.
The LA police reportedly responded to a medical emergency in the Holywood Hills on Tuesday, where the pop-star lives.
According to TMZ, the 25-year-old was found unconscious and was treated at the scene with an anti-overdose medicine called Naloxone. No drugs were found in her home and she refused to tell paramedics what she had taken. Law enforcement sources suggested it was a heroin-based OD due to things found in her home, but a source close to her has insisted that it was not.
The US media have reported that she was in a stable condition, as she was alert and breathing at Cedars-Sinai Medical Centre.
The BBC was told by her spokesperson that 'Demi is awake and with her family who want to express thanks to everyone for the love, prayers and support. Some of the information being reported is incorrect and they respectfully ask for privacy.'
After struggling with substance abuse in recent years, there were fears that Lovato had relapsed. She cancelled her show at London's O2 arena, announcing it on Twitter just hours before the show was due to start. In her single, Sober, released last month, the lyrics read 'Mommy, I'm so sorry I'm not sober anymore. And daddy please forgive me for the drinks spilled on the floor', and the song ends with the lines 'I'm sorry that I'm here again, I promise I'll get help/It wasn't my intention, I'm sorry to myself.'
The release of Sober marked 6 years of sobriety for Lovato.
She was due to complete the North American leg of her tour in Atlantic City on Thursday, but reports have suggested that this date has been cancelled.
Her fans have said that her battles with bipolar disorder, bulimia and addiction have helped them with their own problems. There was an outpouring of support for Lovato on social media, with tens of thousands tweeting '#PrayforDemi' just hours after reports of the incident were released alongside celebrities voicing their support for the singer.
US Health Officials have said that 115 Americans are killed each day by an opioid overdose, with 250,000 dying from that cause in the last decade.
In Simply Complicated, a Youtube documentary released last October, Lovato revealed that her drug use first started when she tried cocaine at 17.
Lovato said 'I felt out of control the first time I did it,' adding 'My dad was an addict and an alcoholic. Guess I always searched for what he found in drugs and alcohol because it fulfilled him and he chose that over a family.'
In 2010, the singer went to rehab for the first time, but said on the documentary that 'I wasn't ready to get sober, I was sneaking it on planes, sneaking it in bathrooms, sneaking it throughout the night'.