Demi Lovato performs the National Anthem prior to the start of Super Bowl LIV between the San Francisco 49ers and Kansas City Chiefs at Hard Rock Stadium on February 02, 2020 in Miami, Florida (Photo by Focus on Sport/Getty Images) LOS ANGELES - Demi Lovato’s drug overdose in 2018 resulted in the singer having three strokes and a heart attack, leaving her with physical limitations that still affect her.Lovato reveals publicly for the first time details about the near-fatal incident in "Demi Lovato: Dancing With the Devil," a four-part docuseries debuting March 23 on YouTube Originals.In the trailer, Lovato says doctors told her family she had five to 10 minutes to live."I was left with brain damage, and I still deal with the effects of that.