With her introspective fifth album Witness, the much-anticipated follow-up to 2013's Prism, Katy Perry reflects on the changes in her own life and in the world around her, delivering songs that both challenge and inspire. Mixing electro-pop, new wave, '90s house and hip-hop influences, the singles released thus far – the Platinum-certified "Chained to the Rhythm" featuring Skip Marley and the follow-up single, "Bon Appétit" featuring Migos – hint at the breadth of the musical and thematic elements found herein. And just like her previous two outings, the album debuted at No. 1 on the Billboard 200.