Watch Charli XCX perform a new banger on the Taylor Swift tour

It's the gig that keeps on giving...

Charli XCX aired a new song while supporting Taylor Swift on the opening night of the ‘Reputation’ tour. Check out the fan-shot footage below.

The singer is currently on the road with Swift alongside Camila Cabello. During the opening night in Phoenix, the support acts joined the ‘Shake It Off’ star onstage for a performance of the 2014 hit.

Ahead of Swift’s performance, XCX took the opportunity to debut a new track to a packed out stadium.

“This is a brand new song,” she reportedly told the crowd. “I’ve never played it before ever! It’s [called] ‘5 In The Morning’.”

One fan posted a clip of the performance to Twitter, enthusing: “UM HELLO CHARLI XCX PLAYING A NEW SONG FOR THE FIRST TIME AND ITS A BANGER??? WE STAN????”

Meanwhile, it’s been announced that Charli XCX will feature on Rita Ora’s upcoming new single – along with Cardi B and Bebe Rexha. Titled ‘Girls’, the tune is set to drop on Friday (May 11).

Earlier today, XCX revealed on Instagram that she is shooting her part for the song’s video tomorrow.

Revealing the news of the single, Rita Ora tweeted: “I’m so happy to finally announce my new single GIRLS feat some amazing powerful women who have inspired me so much!”

Charli XCX hasn’t released a full album since ‘Sucker’ in 2014. Last year, she dropped two mixtapes – ‘Number 1 Angel’ and ‘Pop 2’.

Back in March, Charli XCX shared a playlist to celebrate Women’s History Month. It featured the likes of Dua LipaSigridCardi BSophie and more.