Who Is 'I Knew You Were Trouble' Written About? Lyrics Explained

Taylor Swift fans have some theories as to who "I Knew You Were Trouble" is written about — but which ex is the subject of one of her most popular songs? Keep reading!

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Taylor Swift reveals her hit song I Knew You Were Trouble was written about ex-boyfriend Harry Styles

Who Is 'I Knew You Were Trouble' Written About? Lyrics Explained