Support from fellow celebrities flooded in for Demi Lovato after news broke of her hospitalisation from an overdose.

The star, who recently released track 'Sober' to admit she had broken her sobriety, is awake and responsive after emergency services found her unconscious.

Fans were quick to start a hashtag #PrayForDemi tending. Celebs sent their well wishes for the singer's recovery in terms of both her physical wellness and her battle with addiction.

Ellen DeGeneres has had Lovato as a guest on her chat show a number of times, calling her "a light in this world".

I love @DDLovato so much. It breaks my heart that she is going through this. She is a light in this world, and I am sending my love to her and her family.

— Ellen DeGeneres (@TheEllenShow) July 24, 2018

Ariana Grande kept her message short and sweet.

i love u @ddlovato

— Ariana Grande (@ArianaGrande) July 24, 2018

Nick Jonas is a long-term friend of Lovato's and said he was "reeling" at the news.

Like all of you I am reeling at the news about Demi. All of us love her and need to pray for her to get well. She is a fighter. #prayfordemi

— Nick Jonas (@nickjonas) July 25, 2018

Riverdale star Lili Reinhart, who previously spoke about her own struggles with anxiety, revealed Lovato was an "idol" to her as a teen struggling with mental health.

praying for @ddlovato and her health. When I was 14, she was an idol to me in how she spoke so openly about mental health. And now she continues to inspire thousands of young men and women with her body positivity messages. Addiction and mental illness doesn’t discriminate. 💔

— Lili Reinhart (@lilireinhart) July 24, 2018

Lady Gaga, who has spoken candidly about her own drug use in the past, thanked god Lovato survived.

We should all wrap our arms of love around Demi Lovato. I am so happy you’re alive. Thank God. If I know my monsters as well as I believe I do, we all wish you self-compassion and inner peace. And may you receive the love so many have for you. #ImConfidentInDemi Demi, I love you.

— Lady Gaga (@ladygaga) July 25, 2018

The star certainly has the support of fans, family and fellow industry folk.