Katy Perry

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

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

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.

What does it all mean?!

The 2019 Met Gala is really the gift that keeps on giving.

Perry literally lit up the room!

From Kanye West to Lady Gaga, these songs faced serious backlash.

We've got a doppelganger in our midst!

There are rumors swirling that she was going to replace Celine Dion