Katy Perry released Fan selected single, Dark Horse, from Prism

A new song from Katy Perry chosen by fans as promotional single from the album "Prism" was released today, Tuesday (17).

Entitled " Dark Horse (Feat. Juicy J) ", the track features the rapper Juicy J .

The song is now available on iTunes and the "Prism" is scheduled for release October 22.

Check out the "Dark Horse (Feat. Juicy J)" below: