John Mayer

Her song "Dear John" is rumored to be about ex John Mayer.

The musicians briefly dated between 2009 and 2010.

From Gwen Stefani to Miley Cyrus and John Mayer, these pop stars have written breakup songs about other famous people.

Why is this not surprising?

The pair were first spotted together in February.

Taylor Swift once sang about her crush on Owl City.

The Canadian pop star is a longtime fan of the "Daughters" singer.

"So it's a fun thing people are doing without taking into account that I might see it and be affected by it?"

John has been testing out his hosting chops.

Check out cringe-worthy fashion fails from our favorite celebrity couples.