They’ve been a rumoured item for months now, but Taylor Swift and Calvin Harris might just have finally gone public during the 102.7 KISS FM's Wango Tango concert. Swift and best friend Alana Haim were spotted watching the Scottish DJ's set on Saturday, with the singer reportedly singing and dance along to Harris’ tunes.

Taylor SwiftTaylor was spotted backstage during the Los Angeles concert.

According to E! News, after Harris’ set the pair were spotted sharing a kiss and holding hands backstage before leaving the StubHub Center in Los Angeles together. "They are cute together. They seem happy," a source said. "They definitely look like they are dating.”

Harris and Swift's backstage antics also caught the eye of Ellen K, one of Ryan Seacrest's KIIS-FM co-hosts, who said in an Instagram video that Swift and Harris were spotted holding hands while walking down the hallway together, ”They were really happy," she added.

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Swift and Harris were first rumoured to be dating earlier this year when they were spotted shopping at a Whole Foods store together and then getting close at a Kenny Chesney concert. Then last month they were pictured holding hands after leaving a Haim concert in Los Angeles.

But moving on from Swifty’s always interesting love life, the singer is gearing up to release her new video for single ‘Bad Blood’, which will premiere at the Billboard Music Awards next weekend.

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From what we’ve heard the video looks sure to be the singer’s most epic promo yet and it stars many of her coolest and coolest friends. Swift herself will play a character called “Catastrophic“ while Zendaya joins her as “Cut-Throat,” Lily Aldridge as “Frostbite,” Hayley Williams as “The Crimson Curse,” and Gigi Hadid as “Slay-Z.”

As if that wasn't impressive enough Swift also revealed two more names on Twitter over the weekend, announcing Ellie Goulding as “Destructa X” and Hailee Steinfeld as “The Trinity” with two new teaser posters.

Meet Catastrophe. #BadBloodMusicVideo

A photo posted by Taylor Swift (@taylorswift) on