"Access Hollywood" said the pop star was singing "Irreplaceable" when the fan got out of hand.
"I will have you escorted out right now, al lright?" she told the man in footage posted on YouTube after Monday night's show.
The man backed off and the singer continued the song.
Beyonce is the wife of rapper Jay-Z and the mother of a toddler-age daughter.
2014: The Year in Music [PHOTOS]