Katy Perry

This video is so fetch.

The catchy summer track was co-written by Charlie Puth.

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.

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?!

See how the stars are sharing their messages of support for Pride Month.