Katy Perry

"It was just a blonde girl and I was like, 'Meh, boring.'"

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

Gaga? Katy? Britney? Miley?

She had the best response.

Some of these artists regret their biggest hits.

This year's holiday was met with a mix of celebratory posts and acts of protest.

Staff had no idea they had asked the pop star to wait for a table.

She says she may get back to her singer-songwriter roots.

It's the first time the song has been performed live.

Taylor Swift once sang about her crush on Owl City.