Pop star Demi Lovato staged an impromptu performance at a Los Angeles nightclub on Tuesday (06Jun17) after the sound for her guest DJ set cut out.

The Skyscraper singer was among the celebrities booked to hit the decks for Emo Nite LA at The Echoplex, but when she encountered technical issues, she decided to take charge of the show by picking up her microphone and belting out an a capella rendition of Paramore track Misery Business.

Video footage of the incident shows Demi walking through the crowd as she leads the sing-a-long, before running through the tune one more time.

"Ready, we're gonna sing it again, OK?" she told the audience, according to the New York Post's Page Six column. "Technical difficulties...!"