Taylor Swift is at it again. Once again, the country singer took her heartbreak as inspiration to write another song. This time, it's for her quick fling, Jake Gyllenhaal.

Taylor Swift definitely proved that her songs sell. The singer also admits that most of her songs were written based on personal experiences. So if you broke her heart, you better watch out for a song written about you.

Her "Dear John" song was speculated to be about John Mayer, who she had a rumored relationship with. Taylor was quick to deny that it was about the acoustic singer but John took it as a personal backfire on him.

While everyone is thinking that there might be a song written about her recent ex, Connor Kennedy, it looks like it has to wait for the next album. The singer released a new single from her album "RED" titled, "All Too Well." The song was said to be inspired by Taylor's short romance with actor, Jake Gyllenhaal.

Taylor revealed on Good Morning America that writing "All Too Well" was a hard thing for her to do. She added that she originally started with a 10-minute song but had to filter some parts so that it could make it to the album.

"All Too Well was the hardest to write because it took me a long time to filter through everything I wanted to say. It started out being a 10-minute song, which you can't put on an album. I had to filter it down to a story that could work in the form of a song," the singer admitted.

An insider told US Weekly that there was a part of the song that says about the singer leaving a scarf at her new lover's sister's house. And looking back in 2010, Taylor was photographed wearing a scarf underneath her coat while she walks together with Jake Gyllenhaal. The popstar spent Thanksgiving then at Maggie Gyllenhaal's house in Brooklyn.

"If we break up, I'm going to write about it. But I'm probably also going to write about when I fell in love with you. So there's an upside," Taylor once said.

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