Witness (Katy Perry album)

Witness is the fourth studio album by American singer Katy Perry, released on June 9, 2017, through Capitol Records. Perry has described the album as a journey of self-discovery and liberation. Musically, Witness incorporates elements of electropop and dance-pop, with lyrical themes exploring empowerment, societal commentary, and personal reflection.

The album spawned the singles "Chained to the Rhythm" featuring Skip Marley, "Bon Appétit" featuring Migos, and "Swish Swish" featuring Nicki Minaj. Other promotional singles included "Hey Hey Hey" and "Save as Draft."

Witness debuted at number one on the US Billboard 200 chart, becoming Perry's third number-one album in the United States. It also reached the top of the charts in Canada and Australia. Despite its commercial success, the album received mixed reviews from critics, with some praising its experimental sound and Perry's vocal performance, while others criticized its lyrics and lack of cohesion.

Perry embarked on the Witness: The Tour in support of the album, which ran from September 2017 to August 2018.