The brawl happened while Carey, 55, was performing her holiday anthem “All I Want for Christmas Is You” to wrap up the show.
A fan pointed her camera to show a fight ensuing between two women, one with blond hair, and another with curly hair.
The curly-haired woman appeared to push the blond woman from behind — and the blond woman retaliated by splashing her drink on the other fan.
In response, the curly-haired woman smacked the blonde woman right in the face.
A man with dark hair and glasses grabbed the curly-haired fan and put his arm in between the women to break up their fight.
However, another man with white hair went after the curly-haired fan and started yelling at her.
That caused the dark-haired man to start pushing the white-haired man as they got into it.
The fan who took the video jokingly posed with another man in front of the camera as the drama continued to ensue behind them.
After the footage was shared to X (formerly Twitter), a different concert attendee shared a clip of his own view of the fight.
The fan claimed they were “standing right next to them,” in reference to the group of adults who got into the fight.
The video showed the white-haired man fighting with a different man, who was bald and wearing a red shirt, as a young girl tried to hold him back.
Behind them, other fans could be seen punching and shoving each other.
The incident sparked hilarious reactions from other X users.
“Those moms must have had too much wine,” one fan wrote.
“This automatically gets you on the Naughty list! Not cool!” another person said.
A different fan wrote, “THE PEOPLE POSING AS THEY RECORD IT ARE SO MESSYYY.”
“So they just gonna do this every show???” someone else tweeted, claiming there’s been four other fights at Carey’s Christmas shows.
Carey began a 20-city Christmas tour in the fall to celebrate the 30th anniversary of her “Merry Christmas” album.
The Grammy winner recently performed in Washington DC (on Sunday) and Philadelphia (on Tuesday).
Her next show is on Thursday night at the TD Garden in Boston.
Carey’s Christmas tour ends on Dec. 17 at the Barclays Center in New York City.