Los Angeles Fire Department spokeswoman Margaret Stewart said paramedics received a call about a woman in need of medical attention at 11:22 a.m. Tuesday.
"Sources closes to Demi Lovato have told us that they are actually anxious for her now because this may not be her rock bottom, as they say", she told Inside Edition.
However the emergency dispatcher insists he has no control over them and that the sirens are needed.
The tape from Demi Lovato's emergency 911 call has been released.
Meghan Trainor says Demi Lovato's openness about her battles and troubles helped her cope with her own struggles.
And following her alleged overdose, sources claim the star is determined to get back on the right track once again.
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While time passes, she said the uncertainty has been "excruciating". 'She was getting ready to move into her first apartment. Ms Heaston said that law enforcement will be repeating the neighbourhood canvas near Mollie's home, jogging and work routes.
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Ishaan Khatter had given his thoughts about the film' script to indianexpress.com in an interview earlier. The trade portal also claimed that the film is all set to cross Rs 30-crore mark in its opening weekend.
Reportedly, the medical professionals had to treat her with an anti-overdose drug called, Narcan. "We are going with lights and sirens". Moreover, her mental health struggles make it especially hard for her.
Lovato was next scheduled to perform on Thursday in Atlantic City, New Jersey, but her appearance has been canceled, a spokesperson for Live Nation confirmed to CNN.
In her YouTube documentary released a year ago called "Demi Lovato, Simply Complicated", she openly discussed her cocaine use and battles with alcohol.
Lovato, who turns 26 next month, said in March that she was celebrating six years of sobriety.
In a statement on Tuesday following her hospitalisation, Lovato's rep said: "Demi is awake and with her family who want to express thanks to everyone for the love, prayers and support".
The Disney star has previously sought treatment for her addictions to alcohol, cocaine and OxyContin, most famously in 2010 after punching a backup dancer while on tour with the Jonas Brothers.
Multiple sources close to the singer also told Yahoo Entertainment they were terrified this day would come. (Photo by Emma McIntyre/Getty Images for Refinery29 ) 2018 Billboard Music Awards - Arrivals - Las Vegas, Nevada, U.S., 20/05/2018 - Demi Lovato.