Things popped off during the Teen Mom 2 reunion! Briana DeJesus and Kailyn Lowry have been involved in a nasty feud with each other ever since Bri started dating Kail's ex-husband Javi Marroquin and their hatred for each other runs deep since Bri and Kail continued their feud even after Bri and Javi split. So of course, things escalated quickly when the co-stars all met up in NYC this weekend to film the Teen Mom 2 reunion and a physical fight broke out between Bri and Kail.

According to The Ashley, Kail, Bri, and their co-stars Leah Messer and Chelsea Houska [Jenelle Evans did not attend the taping] were all called to the stage to film a joint segment with host Dr. Drew Pinsky.

kailyn lowry briana dejesus feud — mtv

"Briana was the last girl called to the stage, and she came out and went right at Kail," one source told The Ashley. "Briana’s sister Brittany DeJesus was on set too and she jumped in and got in Kail’s face. They started swinging at each other and Kail was motioning to Bri to 'Bring it on!'"

Another insider said that there had been a lot of tension and a lot of back-and-forth between Kail and Bri before Bri got on stage, and at one point, Kail confronted Bri backstage without cameras present and bascially challenged her to a fight. Security intervened before things could escalate between them, which is why Bri went straight for Kail when she walked out to the set. Bri's sister Brittany was sitting behind Kail, so when she saw her sister come out ready to fight, Brittany jumped and pulled Kail's hair and everyone else on the stage ran to get out of the way.

Shortly after filming, Kail took to Twitter to set the record straight about the fight. "I didn’t get beat up. I didn’t get hit. Reeeeeeeelax [sic]," she tweeted.

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