Katy Perry

Host Ryan Seacrest will also return for Season 21.

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!

Dolly Parton is the QUEEN!

It was one of the hands-down highlights of the night.

Kacey Musgraves joined Katy Perry on her 'Witness' album livestream to teach the pop star how to play "Follow Your Arrow."

Two minutes ago, I'd never heard of Rosenberg, Texas. Now, I have an unstoppable urge to speed through their town so I just might be pulled over by these hilarious cops from Rosenberg Police Department doing the best Katy Perry "Dark Horse" lip dub ever. EVER.

The next CMT Crossroads episode will not air until June 13th, but we've got a sneak preview of what's to come when Katy Perry and Kacey Musgraves share the stage for this musical event.

June 13th. That's when you can catch the highly anticipated premiere of the CMT Crossroads episode, featuring country music's newest sweetheart / Grammy winner, Kacey Musgraves and Pop queen, Katy Perry. But guess what? We've got a sneak peak for you today.

This summer country music's newest sweetheart, Kacey Musgraves, will be joining forces with one of pop music's biggest stars -- Katy Perry. Musgraves heads out with Perry on the Prismatic World Tour next month. But if you can't wait, or you wont be able to make it to a show, you can catch them together on CMT Crossroads...

You may not know his name, but if you're on the Internet (and we know you are because you're reading this), you've likely seen some of Vincent Marcus' videos. Thanks to his dead-on impressions and jaw-dropping beatboxing skills, the Texas native has earned Internet fame and currently has more than 1.8 million followers on the video-sharing app Vine.

Katy Perry has thrown her hat in multiple rings -- her new single, "Roar," is off the charts, she appeared on 'SNL' a couple times (as both host and musical guest), she voiced Smurfette in 'The Smurfs' movies, and she's been vocal about wanting a role in the proposed 'Blade Runner 2.' Now, with 'Beetlejuice 2' under discussions, she already has her eye on a role.