According to TMZ, the "Skyscraper" singer was taken to a hospital in Los Angeles at around noon local time on Tuesday, July 24, 2018.
Jeff Lee, spokesman for the Los Angeles Police Department, said the emergency was in the 8000 block of Laurel View Drive in the Laurel Canyon area.
Representatives for Lovato did not respond to a request for comment.
The 32-year-old Pitch Perfect 3 star has had her own battle with drugs and alcohol addiction, and in a second tweet to a fan drew on that experience to reinforce the fact Demi needed a "support network".
Pakistan polls: Former cricketers turn to support Imran Khan
The Pakistan Army has said it would deploy 371,388 troops at 85,000 polling stations for the July 25 election. The political involvement of the military and ISI is rarely discussed openly due to fear of repercussions.
"Sober", which she released June 21, included lyrics like "I'm so sorry I'm not sober anymore" and "I promise I'll get help/It wasn't my intention/I'm sorry to myself". "I want to be a role model but I'm only human".
Lovato said she also wanted to help others.
Oh hi Guess who's on @BeatShazamFOX tonight at 8/7c?
Lovato was scheduled to perform this Sunday in Toronto with Jason Mraz.
Expect mother of all wars if . . ., Iran leader warns Trump
Pompeo refused to distinguish between moderates and radicals at the heart of the Islamic Republic. We are no longer a country that will stand for your demented words of violence and death.
An eyewitness that attended Lovato's show tells ET the singer "was in a great mood" and "was her normal enthusiastic Demi-self".
Phil McIntyre, Demi's manager previously insisted Demi speaks openly about her life to "let people in". She said she went straight to an Alcoholics Anonymous meeting instead.
Proving to be a woman of many talents, Demi released her debut album Don't Forget in 2008.
"Demi was out Monday night celebrating a friend's birthday in West Hollywood", TMZ reported. Lovato called the affair "a bad experience".
"My whole heart and my whole soul is with @ddlovato today". And may you receive the love so many have for you.
Trump threatens tariffs on all $505bn of Chinese imports
While India doesn't have the same direct exposure to China-US trade as other EM economies, it is reliant on global fundings. Overall, hawkish testimony from Fed Chair Jerome Powell and negatively-viewed comments from U.S.