Correction: TMZ is reporting that a source close to Lovato says the overdose was not caused by heroin. A previous version of this article stated an alleged heroin overdose. To the best of our knowledge the source has not named the drug. Please do feel free to send us a message corrections@shared.com if you have any further questions.

After years of sobriety, Demi Lovato has been rushed to the hospital following an alleged drug overdose.

Lovato, 25, has publicly acknowledged her struggles with drug addiction in the past, but had been sober for the past six years.

In 2013, the "Sorry Not Sorry" songstress said at the height of her addiction, she couldn't go more than an hour without ingesting cocaine. Lovato eventually sought out help for depression, self-harm, alcoholism and drug addiction and was believed to be clean ever since.

"Something I've never talked about before, but with my drug use I could hide it to where I would sneak drugs. I couldn't go without 30 minutes to an hour without cocaine and I would bring it on airplanes," Lovato said in an interview with Access Hollywood at the time, adding that she was diagnosed with bipolar disorder during her treatment.  

"I would smuggle it basically and just wait until everyone in first class would go to sleep and I would do it right there. I'd sneak to the bathroom and I'd do it," she said,

However, last month the former Disney star released a new single called "Sober" which hinted at a recent relapse. It sparked fans to believe the lyrics were heavily connected to Lovato's personal life.

Some of the telling lyrics included the lines: "Momma I'm so sorry. I'm not sober anymore. 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."

The Overdose

Sadly, after the song's release, Lovato was believed to have continued drug use, and on July 24, was reported to have been found unconscious in her Hollywood Hills home.

She was revived with Narcan "” an emergency medication to reverse the effects of a narcotic overdose - and rushed to an L.A. hospital.

Although most reports say the overdose was heroin related, an insider close to the singer told PEOPLE it was not.

TMZ revealed that the starlet was last seen on Monday night celebrating a friend's birthday in West Hollywood. Lovato reportedly posted pictures of herself and her friends to her private Instagram account, and seemed to look happy in them.

According to Lovato's aunt, Kerissa Dunn, the "Skyscraper" singer is now in stable condition, and "awake and responsive."

Sources also told PEOPLE also there had been clear signs Lovato's health had been in decline for a while.

"Things have been a total mess for months. She and her team severed ties, and they played a large part in getting her sober years ago. She hasn't been in a good place," the source said.

"You could tell when Demi was doing well with her sobriety because she wasn't hanging out at clubs," another insider added. "She has still very much kept up her work schedule and daily life, but there have definitely been signs that she isn't doing great with her sobriety."

The Aftermath

Since the news broke out of Lovato's reported overdose, Live Nation has confirmed that Lovato's upcoming July 26 concert in Atlantic City has been canceled.

Lovato's appearance on Jamie Foxx's show Beat Shazam, which was filmed in December, was originally scheduled to air on July 24, but had been replaced with another episode when the news broke out.

"In light of recent reports, we have decided to replace the episode of BEAT SHAZAM with another all-new episode. Our thoughts go out to Demi and her family," a statement from FOX said.

Several stars, including Ellen DeGeneres, Brady Paisley, Wendy Williams have since taken to social media to voice their support for Lovato, and offered her their well wishes.  

Our thoughts and prayers are with Lovato and her family during this scary time.

[H/T: PEOPLE, TMZ, E! Online]