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
Walking on Air (Katy Perry song) it would "make you long for C+C Music Factory". The song was also described as evoking the music of Swedish singer Robyn, an artist of whom Perry is a fan. Sal Cinquemani from Slant Magazine was very positive of the song: he described it as "surprisingly soulful, throwback" to 1990s deep house, although he noted that Åhlund decided to give Perry a different sound from the Euro electro-pop he had produced for "Body Talk" (2010). Greg Kot from "Chicago Tribune" deemed the single a "catchy pop tune", while Randall Roberts from the "Los Angeles Times" wrote that the song's "euphoria"