Taylor Swift took to Instagram last night (February 11) to share a video of her getting a very public haircut… with some fans apparently spotting her ex-beau Harry Styles in the short clip.

In the footage, the I Knew Were Trouble singer - who had just finished her final Red tour show at London's O2 Arena - is seen filming a crowd of people backstage at the gig, as she says: "This is how many people are watching me get a haircut right now.We don't do anything without an audience do we?"

As T-Swizzle pans round the faces, her mum Andrea can be seen cheering her on, as well as UK songstress Ellie Goulding - who came out to sing Burn with the star - and model, Cara Delevingne.

However, in a blink-and-you'll-miss-it-moment, some have alleged that Styles can be seen perched on the sofa alongside Ellie and Cara.

While the clip is too blurry to make out the One Direction heartthrob, a Twitter user fuelled speculation that Hazza was at his ex-girlfriend's show after posting: "Just saw harry styles cara delevingne and ellie goulding backstage at Taylor swift OMG."

While it is still unclear whether the mystery man was Harry, one thing is for sure, Swift was more than happy with her new haircut, later posting a snap of herself posing with Goulding and showing off her new 'do.

She accompanied the Polaroid snap with the caption: "London, I could never thank you enough. See you next time! PS: short hair, don't care. (!!!)."

Delevingne later shared another pic of Swift taking the plunge and getting her hair cut, along with the comment: "@taylorswift chopping off her locks.", but did not mention Styles' presence.

Both Harry and Taylor are yet to comment on the speculation. Keep it MTV News UK for more…