Demi Lovato says she was sexually assaulted the same night of her 2018 near-fatal overdose

• Demi Lovato's new documentary "Dancing With the Devil" premiered at SXSW this week.
• In the film, she said that her "dealer" sexually assaulted her the night she overdosed in 2018.
• "I was naked, I was blue, I was literally left for dead after he took advantage of me."

Demi Lovato said she was sexually assaulted by her "dealer" in her new documentary, "Dancing With the Devil."

The film, which premiered at SXSW this week, examines the events that led to Lovato's near-fatal overdose in 2018.

One month after she celebrated her six-year sober anniversary, Lovato relapsed. She said in the doc that she was open with her friends about wanting to drink alcohol again - but was also secretly using hard drugs like heroin and methamphetamine.

The documentary details the night she overdosed, as Lovato partied with her friends and then claimed she was going to bed. Instead, she said in the documentary that she invited a man to her house, who gave her drugs apparently laced with fentanyl.

"What people don't realize about that night for me is that, I didn't just overdose, I also was taken advantage of," Lovato said of the unnamed man.

The singer's best friend, Matthew Scott Montgomery, said in the documentary that none of Lovato's friends knew about the man: "I found out later, of course, that wasn't the first time that he had come over or supplied her."

Although Lovato didn't go into detail about the assault, she revealed she's had her "fair share of sexual trauma."

"When they found me I was naked, I was blue, I was literally left for dead after he took advantage of me," she said.

"When I woke up in the hospital, they asked if I had had consensual sex. And there was one flash that I had of him on top of me. I saw that flash, and I said yes," she continued. "It actually wasn't until maybe a month after my overdose that I realized, 'Hey, you weren't in any state of mind to make a consensual decision.'"

Lovato also said the event "amplified" the existing trauma she had from her father, who was estranged from her family before his death in 2013. Lovato said he was an addict and alcoholic, who was abusive towards her mother.

"That kind of trauma doesn't go away overnight. And it doesn't go away in the first few months of rehab, either," Lovato said in the film, referencing her three-month stint in rehab in 2018. "That's something that sticks with you for a while after, because all of the 'daddy issues' that I had had growing up, now I was literally discarded and abandoned."

The revelation comes in the second episode of the four-part documentary series, which will premiere March 23 on YouTube.

"I've realized a lot of my past traumas came to a head that night, but at the end of the day, I'm responsible for my life choices and hold only myself accountable," she concluded at the end of the episode.