Katy Perry

"I think that mom shaming is super lame."

Parents and students of two Texas schools were shocked to see graffiti with racial slurs covering their school which included a possible threat of violence.

"This is not okay. You should be singing here because you love music."

She's not a "Watermelon Sugar" fan.

"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?

Some of these artists regret their biggest hits.

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

From on-stage baby bump reveals to record-breaking Instagram announcements, these celebrity pregnancies made major headlines.

Get a room!

Aliens confuse Zooey for Katy in the cosmic clip.