TMZ initially reported that Lovato appeared to have suffered from a heroin overdose -- however, the publication later put out a second report from a source claiming the singer did not OD on the drug.
A spokesperson for the Los Angeles Fire Department tells ET that at 11:22 a.m. PT they responded to a medical need call. Authorities would not confirm that the woman taken to the hospital was Lovato, though ET has confirmed through a source that the female patient is indeed Lovato.
"We transported a 25-year-old female patient to a local hospital,” the spokesperson says.
According to the dispatch call obtained by ET, Lovato was unconscious when paramedics arrived. TMZ also reports that she was treated with Narcan -- an emergency treatment for narcotic overdoses -- at her home in Hollywood Hills, California.
The singer's rep later released a statement and an update on her condition, saying, "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 and not speculation as her health and recovery is the most important thing right now."
“Momma, I’m so sorry, I’m not sober anymore,” she sings on the emotional track. “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."
A sources previously told ET that Lovato's relapse occurred at some point in between the North American leg of her tour, which ended on April 2 in Newark, New Jersey, and her European leg, which started in Belfast, Ireland, on May 24.
"Demi relapsed and started drinking alcohol again," an additional source told ET. "Her song is intense, but that's how she deals. She has to be brutally honest and put it out there so that she's not burdened with holding on to her struggles privately."
Lovato last appeared at the California Mid-State Fair on Sunday, alongside friend Iggy Azalea.
Ahead of their performance, Azalea spoke to ET about Lovato's reported relapse, saying that she knew of the singer's recent struggles early on and was terrified that someone would use the news against her. In the end, she said she was proud of Lovato for confronting her problems head-on.
"I was just really proud of her that she was honest, because it's really hard to be honest with yourself," Azalea told ET. "So, to be honest with the whole world, [to share] something that you struggled with very publicly, it's something that is very admirable. I was very proud of her to see her write that song and put it out."