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Taylor Swift Previews “I Knew You Were Trouble” Song on Good Morning America

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Taylor Swift poses in the press room at the iHeartRadio Music Festival at the MGM Grand Garden Arena September 21, 2012 in Las Vegas, Nevada.

Which former flame could this new song be about?

As a follow up to her first single "We Are Never Ever Getting Back Together" from her upcoming album Red, Taylor Swift gave fans a sneak peek on Good Morning America Monday of her new track, "I Knew You Were Trouble."

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"It's a song that's one of my favorites on the album because it sounds just as chaotic as the feeling was when I wrote it," Swift, 22, explained on GMA. "It's a song about being frustrated with yourself because here you are heartbroken and you knew, when you first saw that person, you saw all these red flags, and you just went for it anyways. So, shame on me."

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In the new breakup track, Swift sings, "I knew you were trouble when you walked in. So shame on me now. Flew me to places I'd never been, so you put me down."

Swift's exes include Joe Jonas, 23, Taylor Lautner, 20, Jake Gyllenhall, 31, and John Mayer, 34. The country singer is currently dating Conor Kennedy, the 18-year-old son of Robert F. Kennedy, Jr. and the late Mary Kennedy.

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Red will be available in stores on Oct. 22. "I Knew You Were Trouble" will be available on iTunes at midnight.

Tell Us: Who do you think "I Knew You Were Trouble" is about?

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