Rumors first began swirling after Niall Horan was spotted at the singer's sold-out concert in London's O2 on Sunday night. Horan was watching her performance from the side of the stage and even sang along at some to some of her more famous tunes.
But a rep for the boy bander tells E! News, "He is just a fan of her music. There's nothing going on."
An eyewitness also shared with us that the heartthrob was "just in a big group of people," and that no other members of the pop band were present.
"He was only seen during her last song of "We Are Never Getting Back Together," where he was at the side...
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