Free OK ringtone for your phone. Listen first, then download the version you like. Artist: Katy Perry. You can choose from 6 versions between 19 and 31 seconds. More ringtones in the same style are under the tags r&b, pop and guitar. Two formats are available: .MP3 for Android and other phones and .M4R for iPhone. More ringtones by Katy Perry are on the artist page, the link is under the title.