Selena Gomez watches ex Justin Bieber in concert

Selena Gomez was a surprise attendee at ex-boyfriend Justin Bieber's concert on Wednesday night (23Mar16).

The couple dated from 2010 to 2014, but were spotted together again in November (15) at a hotel bar in Los Angeles, where Justin was filmed serenading Selena.

On Saturday (19Mar16), Justin caused a near meltdown among fans when he posted an old image of himself kissing Selena on his Instagram.com page on Saturday. He captioned the image "Feels", and Selena is believed to have replied with her own one-word response: "Perfect".

Fans are now sure to be reading into the fact that Selena attended the third Los Angeles night of his Purpose tour on Wednesday.

The Staples Center themselves confirmed Selena's presence at the show, tweeting: "Celebs spotted at @justinbieber night 3 @selenagomez @KimKardashian @kanyewest @ToriKelly @KendallJenner @kourtneykardash #purposetourLA."

An eyewitness at the gig confirmed to Entertainment Tonight that Selena looked "gorgeous and happy" as she rushed into the venue to catch her ex beau doing his thing.

During an interview with Refinery29 last October (15), Selena insisted she and Justin have found "closure" and will continue seeing each other as friends.

“At this point, there is no anger," she said. "There's closure in a very good, healthy way. We’ve seen each other. I'm always encouraging and I am proud of his journey... We grew up together. We both made mistakes. That's it."

However, Justin admitted he was open to rekindling his relationship with his first love during an appearance on The Ellen DeGeneres Show back in November (15).

"We have a lot of history together and I am sure it could possibly happen," he said. "I think we are both just on our own journeys and figuring ourselves out and I think maybe once we figure ourselves out we can come-back and make an awesome duo."