She called for her band to stop, and then directly addressed the offending hotheads.
"I can't have a fight in front of me while I'm singing this song! No fighting allowed," she scolded the duo. "I don't know what's happening but I would quite like it to stop. It doesn't matter whose fault it is."
"Excuse me, all of you – stop it," she reportedly called out to her fans, who had begun to chuckle nervously. "I'm sorry all of you if you're upset."