"We Are Never Ever Getting Back Together"
The telling lyrics: "And you would hide away and find your peace of mind / With some indie record that's much cooler than mine."
Who it's supposed to be about: Jake Gyllenhaal
Why? From evidence like the scarf used in the video to the actor in the video looking a lot like Gyllenhaal, all signs point to Swift's 2010 fling. (He also has a well-documented love for indie bands.) Bonus: the song "All Too Well" is also rumored to be about Gyllenhaal.