US superstar Beyonce threatened to have a male fan escorted out of her Copenhagen concert after he slapped her buttocks while she was performing on stage. Access Hollywood said the pop star was singing her hit song, Irreplaceable, when the fan got out of hand. \"I will have you escorted out right now, alright?\" she told the man in footage posted on YouTube after Monday night\'s show. The man backed off and the singer continued the song.