Katy Perry

Anderson Davis says the singer was nothing but professional with him.

Model Josh Kloss claims the pop star exposed his penis at a party.

Katy Perry must pay up.

From donut-licking to (fake) severed heads, these celebrity antics had us in a tizzy.

The pop star even made a joke while on the stand.

Katy revealed how her and Taylor's reconciliation happened IRL.

From Katy Perry to Justin Bieber, here are some of the biggest names who have had beef with pop star Taylor Swift.

Swift is the top-earning celebrity this year!

Katy appears to be showing support for Taylor amid the pop star's drama with Scooter Braun.

We finally know how the two pop stars found peace.

The old friends revealed their truce in Swift's 'You Need to Calm Down' video.

What does it all mean?!