One Direction's Niall Horan and alleged girlfriend Barbara Palvin dating rumors confirmed on Twitter, spotted on London date holding hands! [PHOTOS]

Thanks to a pub outing that happened to involve Niall Horan and Barbara Palvin, one fan might have just outed the new young couple on Twitter. After spotting the One Direction stud with his rumored Victoria's Secret model girlfriend, a girl by the name of Tam (on Twitter) got some photos taken and dug a little deeper with a friend of Niall's to find out more about the alleged couple.

The only real way to explain this night is through Tam's own Twitter posts, complete with Instagram and Twitpic evidence of the night: 

Niall looks ace tonight