C Instrument - Level 2 - Digital Download SKU: A0.1431612 By Katy Perry. By Henry Walter, Jordan Houston, Katy Perry, Lukasz Gottwald, Max Martin, and Sarah Hudson. Arranged by Marco Polo C. Ignacio. Hip-Hop,Pop. Lead Sheet / Fake Book. 3 pages. MARCO POLO IGNACIO #1012087. Published by MARCO POLO IGNACIO (A0.1431612). Dark Horse is a song by American singer Katy Perry featuring American rapper Juicy J. It was originally released on September 17, 2013, by Capitol Records as the first promotional single from Perry's fourth studio album, Prism (2013). Three months later, it was released as the third official single on December 17. Both artists co-wrote the song with its producers, Max Martin, Cirkut, and Dr. Luke, alongside Sarah Hudson. It was conceived by Perry and Hudson during a writing session in Perry's hometown of Santa Barbara, California, and Juicy J was later commissioned for a verse on the song.