Taylor Swift admits 'I Knew You Were Trouble' is about Harry Styles

Taylor Swift has seemingly admitted that her latest song is about ex-boyfriend Harry Styles.

The singer performed her hit 'I Knew You Were Trouble' at last month's Brit Awards and hinted that it was easy to channel the emotion knowing Styles was in the audience.

© Rex Features / Startraks Photo/Rex Features

"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'," Swift told The Sunday Times magazine.

Asked how she felt knowing Styles was watching the performance in the audience, she replied: "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."

Although they publicly confirmed their relationship towards the end of 2012, the couple had previously dated a year earlier, according to a close friend of Swift.

Meanwhile, Swift has reportedly been cut out of One Direction's concert movie 1D3D due to her split from Styles.

The star will release '22' on April 1 as the third cut to be lifted from her latest album Red.