Taylor Swift admits that "I knew you were trouble" is about Harry Styles

She is famous for writing songs about her menagerie of famous ex-boyfriends. And it seems the subject of Taylor Swift's most recent failed relationship is no exception.
The 22-year-old singer has finally revealed her 2012 hit single I Knew You Were Trouble is about her ex-boyfriend Harry Styles. Speaking about her spirited performance at the 2012 Brit Awards in front of Harry and his One Direction bandmates, the singer was asked how she felt performing the number while her ex was watching.
Taylor told The Sunday Times: 'Well, it’s not hard to access that emotion when the person the song is directed at is standing by the side of the stage watching.'
Speculation had been rife that Taylor had penned the song about the One Direction star when they first briefly dated in Spring 2012, and the star appeared to confirm the rumours were true in the interview with The Sunday Times magazine.
Speaking about her performance of the song at this year's Brit Awards where she stripped down to a sultry black outfit, she said: 'You’re balancing the analytical side of your brain which is telling you where to go and how to go there, with the other side of your brain, which is saying "Feel everything you’re singing, and show it on your face. '"Feel everything exactly as you felt it when you wrote the song."'

Harry remained cordial despite uncomfortable scenes at the February London award ceremony, where the former couple were said to have refused to make eye contact backstage. And in an exclusive chat with the Mail Online: 'I thought her performance was really good, she looked great.'After a brief fling in Spring 2012, Taylor was heartbroken when Harry was photographed kissing American model Emma Ostily in New Zealand in April.However, the young couple gave their romance another try last November.
But just days into the new year, they split up after less than two months together following a bitter row on a Caribbean holiday. On January 5, she quoted a line from I Knew You Were Trouble on her Twitter page: 'Til you put me down.'
-I.
source:dailymail