It's not that Taylor has hurt Katy's feelings or something, it is that "Back To December" really moved Katy...to tears!

Even though Katy is happily married she can relate to the emotion behind Taylor's song, the heartbreak, and the talent that went into making the song. She appreciates Taylor's music and shared her feelings on Twitter.

And what about you? Did "Back To December" make you cry too? :/