Nick Lachey

The 44-year-old model has been married to former 98 Degrees star Nick, 51, since 2011.

The former flames were married from 2002 to 2006.

Fans are comparing it to Ken's 'Barbie' serenade.

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

Taylor Swift once sang about her crush on Owl City.

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

Because breaking up is hard to do.