The publication claims the 25-year-old singer was taken from her Hollywood home and is now receiving treatment.
Her condition is currently unknown.
Los Angeles Police Department confirms to PEOPLE, 'LAPD and LAFD responded to a medical emergency at the 8000 block of Laurel View Dr. at 11:40am.
A representative for the Los Angeles Fire Department additionally told the publication they 'transported a 25-year-old female patient to a local hospital.'
Demi has battled addiction, mental illness and an eating disorder for years. In 2011, the entertainer entered rehab, where she was also treated for bipolar disorder, bulimia, self-harm and addiction.
Lovato later relapsed after she left the treatment centre, then entered a sober living facility for a year.
Last March, Lovato revealed she celebrated six years of sobriety.
In June she released a new song, 'Sober', where she revealed she had relapsed.
Ariana Grande tweeted her support for Demi shortly after news broke of her hospitalisation.
"I love u," she wrote.
This article originally appeared on New Idea.