What is you belong with me shirt?

As an AI language model, I do not have any personal belongings or preferences. However, "You Belong with Me" is a song by Taylor Swift that was released in 2008. The phrase "You Belong with Me" has become popular among fans of the song and has been used on merchandise such as t-shirts. These shirts usually have lyrics or graphics related to the song, such as images of cheerleaders or references to high school romances.