Is John Mayer's 'Shadow Days' About Jennifer Aniston?

John Mayer

Despite officially breaking it off for good three years ago, there's a rumor that John Mayer's new single, "Shadow Days," is about Jen Aniston.

A source tells that the lead Born and Raised single is about the Hollywood A-lister and their on-again, off-again relationship. "'Shadow Days' is about Jen. It really took him a long time to get over her. He really loved her a lot," the source tells the website about Mayer's relationship with Aniston.

"He wrote the song as a farewell letter knowing [Jen] would hear it," the source added. "Ultimately he's done a lot of self reflection though and he realizes they weren't right for each other."

Mayer is no stranger to high-profile relationships (see also Minka Kelly, Taylor Swift, Jessica Simpson and Jennifer Love Hewitt for just a sampling of the ladies he’s been linked to), but it seems these days he’s focused on finding love and perhaps a new musical muse with someone who isn’t famous.

"[John and Jen] weren't right for each other, but he is really a good guy," the source continued. "He's looking for a nice, non-famous girl he can relate to. . . He loved [Jen and Jessica] both but it really affected him emotionally and it wasn't worth it."

Regardless of who "Shadow Days" is about, fans should look forward to more great music from John when he drops Born and Raised on May 22.

Listen to "Shadow Days" below and let us know in the comments if you think it is about Jennifer Aniston.