Katy Perry is ready to play.

The pop star won't just be waking up in Vegas, she'll be spending a lot of time there as part of her new two-year residency PLAY, beginning Dec. 29.

The show features nearly two-dozen of her greatest hits and invites casual fans and devotees alike along for the ride. "We really went down the playlists and said, 'What's the top 20 songs that everyone in the world are listening to?'" she tells EW. "And that's our set list. All the songs have been revived. We've given them a little botox."