August Alsina collapsed on stage during his performance at Irving Plaza in New York City, and the scary moment was caught on tape by his fans.

Alsina was performing his hit single 'Numb', and everything seemed to be going well.  Then he seemed to go limp and dropped right into the crowd in front of the stage.

After he collapsed, security rushed to help him and they got him backstage.  Fans said August was taken out of the venue on a stretcher but he waived to the fans.  So far, there has been no word given on why he collapsed.  Check out a couple of the videos showing the incident below.