People were shocked to hear via the Internet that Demi Lovato had been rushed to the hospital from an apparent heroin overdose, though the actual cause of her hospitalization has yet to be confirmed. The 25-year-old “Sorry Not Sorry” singer is now in stable condition, according to reports.

She has long battled with depression, addiction, and self-harm, and been candid about her struggles with mental health. She has become a fierce advocate for mental health, even setting up stations for people at her concerts to receive counseling.

Though she had been sober for six years, Lovato appeared to have relapsed, which she admitted to via her song “Sober.” In it she sings:

Mama, I’m so sorry I’m not sober anymore / And daddy please forgive me for the drinks spilled on the floor / And I’m sorry for the fans I lost who watched me fall again / I wanna be a role model, but I’m only human.

The heartbreaking reveal left fans worried, but Lovato’s strength has always pulled her through even the hardest of times. So the news of her hospitalization from a possible overdose was shocking and saddening for fans, friends, and loved ones.

Many celebrities came through to voice their support for the singer. Here are some of the words of encouragement sent.