An overzealous Beyonce fan found himself at the singer's mercy Monday night after slapping her on the behind during her Copenhagen, Denmark, concert.

The singer had fans in the front row help her belt out her single, "Irreplaceable," off her second studio album, when one man couldn't resist her bootylicious backside and reached out to give it a smack after she let him sing a line.

Beyonce paused for a moment after, turning out to reprimand the fan.

"I will have you escorted out right now, alright?" she said, half-jokingly before prancing off to another part of the stage.

The fan was obviously not ready for that jelly.

Watch it below...