Was Harry Styles hanging out backstage at ex-girlfriend Taylor Swift's London concert with Cara Delevingne, Ellie Goulding & more? [PHOTOS & VIDEO]

Thanks to some posts on Twitter and Instagram, we just might have some evidence of Harry Styles hanging out backstage with his ex-girlfriend Taylor Swift! Not only was he with Swift, his rumored fling from earlier in 2013, Cara Delevingne, was alos in attendance, as was Niall Horan's rumored lover Ellie Goulding. Did we hit the mother-load of hangouts?

We should mention that this has not been officially confirmed, but from the looks of this Instagram video posted by Taylor, it looks like Harry was backstage with these beauties!

Did you spot him? Well even if you didn't there were plenty of fans posting to Twitter about spotting the rumored boyfriend of Kendall Jenner at the London concert.

One fan wrote: "Had the best time at @taylorswift13 and I can't believe @Harry_Styles was there Such a brilliant show, love you Taylor xxz."

Another said: "Just saw harry styles cara delevingne and ellie goulding backstage at Taylor swift OMG."

So it would seem that Harry was indeed hanging out backstage. We'll have to wait for better video and photo evidence, but for now we can just speculate like the rest of the world!

Meanwhile, Taylor cut her blonde locks a bit shorter while backstage, too. Check out this Instagram post from Cara Delevingne that definitely proves this:

Also, Taylor posted this Polaroid shot to her Instagram with Ellie Goulding, who came out on stage with Taylor to perform "Burn" together:

Also, Ed Sheeran was in the house.

Ed tweeted: "Sung Lego House for the first time ever with a band tonight with @taylorswift13 at her London show. Orsum, thanks for all the love."

While Taylor wrote: "First night in London and @edsheeran came out to surprise the crowd with 'Lego House', Earth-shattering screams ensued. What a lad. #redtour."