Free Dark Horse ringtone for your phone. Listen first, then download the version you like. The song is performed by Katy Perry featuring Juicy J. There are 7 versions, from 15 to 45 seconds long. More ringtones in the same style are under the tags electronic, pop and upbeat. Android users need the .MP3 file, iPhone users need the .M4R file. Both are free. More ringtones by Katy Perry are on the artist page, the link is under the title.