Katy Perry

Our favorite, once-inseparable celebrity besties and their unfortunate fallouts.

While some stars were able to recover like a pro, others needed a little help from the audience.

Are Katy and Orlando thinking about having kids?

There are literally too many celebrities to list.

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.