Why was he there? Just a fan, it turns out--he wasn't trying to make Harry Styles' ex his girlfriend or anything.
A One Direction rep is setting the record straight before this one even takes off, telling E! News: "He is just a fan of her music. There's nothing going on."
An eyewitness reported that Niall "seemed like he was enjoying [the show]," and that he was "quickly taken away by his security" after her last song.
Gallery | 18 Times Niall Horan Was TOO Cute in 2013!