Katy Perry following her ex-husband Russell Brand's transition from comedy work to activism, and released a concert film titled "Katy Perry: The Prismatic World Tour" through Epix, which took place during her tour of the same name. Perry also made a cameo appearance in the music video for Madonna's song "Bitch I'm Madonna" in June 2015. The following month, she released another fragrance with Coty, entitled Mad Potion. In September 2015, she appeared in the documentaries "Katy Perry: Making of the Pepsi Super Bowl Halftime Show", which followed Perry's preparation for her Super Bowl performance, and "", which followed the life and
Katy Perry relate to all those songs. They're still so timeless." Additionally, Perry borrows influence from "Flaming Red" by Patty Griffin and "10 Cent Wings" by Jonatha Brooke. Perry intends to become "more of a Joni Mitchell", releasing folk and acoustic music. Perry's autobiographical documentary "Katy Perry: Part of Me" was largely influenced by "". She admires Madonna's ability to reinvent herself, saying "I want to evolve like Madonna", and has credited Madonna for inspiring her to make "Prism" "darker" than her previous material. Perry names Björk as an influence, particularly admiring her "willingness to always be taking chances". Other musicians who