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TAYLOR Swift has taken the UK by storm with her Eras tour.
The international pop star performed to hundreds of thousands of adoring fans at Wembley Stadium this weekend.
But during one of her songs, she offered the microphone to a backing dancer who shocked the audience.
The dancer, who was dressed in red shouted "Up yours w*****", causing the singer to burst out laughing.
The clip was shared by a fan who wrote: "I'm half convinced Taylor never knows what he's gonna say he just surprises her to get a reaction and she almost** lost it yesterday."
"LMAOOOOO that's absolutely a genuine reaction right there, dude had the element of surprise taylor couldn't do the high note seriously," one fan responded.
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"one of the dancers confirmed last week taylor doesn’t know what he’s going to say," said another.
The backing dancer is called Kam and he has a reputation for saying outspoken things when she passes him the microphone.
This comes after Taylor threw shade at Kim Kardashian with some thinly veiled jabs while performing live.
Taylor, 34, performed her tune "thanK you aIMee" at the London gig.
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"thanK you AIMee" is from her latest LP, The Tortured Poets Department.
The song is known to be about her longtime feud with Kim - as the capitalized letters in the song title blatantly spell out "Kim."
Taylor combined the song into a surprising mashup - she mixed it with her classic hit "Mean," which seemed to be a jab in itself.
Not only that, but Taylor had something to say to an audience of 80,000 before playing it.
“Every time someone talks sh**, it makes me work even harder," she declared (seen here) with a smile.
"Kim Kardashian was found crying," one X user wrote as the concert clip made the rounds.
"Yo somebody check on @KimKardashian because there was a murder in London tonight!!!!" another wrote.
"The way she performed that and Mean as a combo and that’s why we love her," wrote a third.
Taylor was also joined on stage by proud boyfriend Travis Kelce.
The Super Bowl LVIII champ hoisted Taylor in to introduce her song, I Can Do It With A Broken Heart.
Usually, two dancers carry her into a giant heart-shaped box for the number.
But this time, Travis joined in as Taylor was carried in his arms and gently placed into the giant set piece for the intro.
Travis committed to the appearance by wearing a top hat and tuxedo, while Taylor wore a white gown.
The audience erupted as he made his grand entrance with his love in his arms.
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Taylor burst into a big outfit reveal with a white two-piece top that matched his tuxedo.
He sweetly applied makeup to her face as she smoldered at her man in an incredible, intimate moment before she broke into the song.