After dating for less than three months, it seems like Harry Styles and Kendall Jenner have already lost interest in each other, as the One Direction singer was spotted backstage during his ex Taylor Swift's performance at London's O2 Arena on Tuesday night.

The "I Knew You Were Trouble" singer took to her Instagram account to share a fun-filled video clip, which shows the 20-year-old Harry Styles look-alike sitting alongside another of his former girlfriends, Cara Delevingne, as well as the "I Need Your Love" singer Ellie Goulding, who joined Swift on stage earlier in the evening. Radio 1 DJ Nick Grimshaw also was there.

In the last night's footage, a huge group of people is watching the "We Are Never Ever Getting Back Together" singer getting her long blonde hair chopped into a new, chic bob haircut. "Haircut," Taylor Swift wrote the following caption. As the camera circles around in the room, Harry Styles can be seen relaxing on a sofa with his fellow British pals.

In addition, one of the fans expressed her joy via Twitter, after witnessing the Midnight Memories singer at the concert, the last of Swift's London gigs: "Just saw harry styles cara delevingne and ellie goulding backstage at Taylor swift OMG."

The tweet spread instantly among One Directioners, with many of them referring to the aforementioned Instagram video. The British boyband's fans also shared a screenshot of the clip, and one fan tweeted: "Harry talking to Ellie, and in the second pic with his hands up and everything #haylor."