Swift, who won the night's honor for artist of the year, was walking backstage with Gomez at the MGM Grand venue in Las Vegas when they bumped into Bieber. Now, there were a few bodyguards blocking the exchange but when Gomez stopped to warmly greet Bieber with a hug and a peck on the cheek, Swift stuck her tongue out in mock horror at the tumultuous couple.
Very "22." The singer also seemed to get bored of the prolonged reunion. Check it out for a limited time at the 1:01 mark in the video below.
Eventually, Gomez is pulled away and a few minutes later, Bieber is seen asking a member of his entourage to block one of the cameras from continuing to record him, eventually stepping out of the frame. Ah, the beauty of the backstage cam.
Gomez, 20, and Bieber, 19, have been on-again-off-again for years, officially ending their relationship around New Year's 2013. She's been seen hanging out with Swift, 23, quite a bit. Gomez and Bieber were rumored to have rekindled their romance in Las Vegas leading up to the show, though Gomez had debunked rumors that they were back together, according to E! News.
However, Swift had little to be disgusted about Sunday night, taking home the most of the evening's awards.
Overall, it was a rough night for the Biebs, who, despite several wins and two high-energy performances, was booed by raucous audience members when he took the stage to accept the first-ever Milestone Award.
Follow Ministry of Gossip @LATcelebs.