Brought to you by Desert Diamond: http://ddcaz.com Demi Lovato has reportedly been hospitalized for a heroin overdose. According to TMZ, law enforcement officials say the 25-year-old singer was rushed to a hospital in Los Angeles after she suffered from what appeared to be a heroin overdose. The entertainment outlet reports that Lovato, whose condition is not known, was transported from a Hollywood Hills home on Tuesday just before 12 p.m. A rep for Lovato did not immediately respond to Fox News' request for comment. An LAPD spokesperson told Fox News that the Los Angeles Police and Fire Departments responded to a "medical emergency call" on the 8000 block of Laurel View Drive in the Hollywood Hills neighborhood at 11:40 a.m. However, the spokesperson noted that the "LAPD could not confirm the identity of the individual at the moment.” Lovato tweeted earlier in the day a promotion for her appearance on the pre-taped Fox show "Beat Shazam" Tuesday night.