Listen to Katy’s new song “Smile”: https://katy.to/smileID Get "Dark Horse" from Katy Perry's 'PRISM': http://katy.to/PRISM Katy Perry Complete Collection on Spotify: http://katy.to/SpotifyCompleteYD Katy Perry Essentials on Apple Music: http://katy.to/AMEssentialsYD Watch your favorite Katy videos on YouTube: http://katy.to/MusicVideosYD Follow Katy Perry: Website: http://katy.to/WebsiteYD Ins