Thou shalt not mess with Patti LaBelle.

The legendary R&B/Soul singer performed in Vancouver Friday night and invited a couple of audience members to have a good time with her on stage, but there’s always that one person who takes it just a tad bit too far.

While performing her smash hit “Lady Marmalade,” a fan began unbuttoning his shirt in front of the crowd and she quickly stopped the performance. In the TMZ-provided clip above, Patti loses it once the fan turns his back on her. She ends up kicking him out of the building.

Patti mentioned that she isn’t Nicki Minaj or Miley Cyrus, so she would not be condoning such behavior. Watch the footage below.