AceShowbiz -

Katy Perry is restless for music. In anticipation of the release of her fifth studio album "Witness" on June 9, Perry has announced the track list of her latest effort. It features fifteen tracks, including three collaborative songs titled "Chained to the Rhythm" featuring Skip Marley, "Swish Swish" featuring Nicki Minaj and "Bon Appetit" featuring Migos.

"Witness" is the follow-up to 2015's "Prism". Perry previously revealed on "The Ellen DeGeneres Show" that she started working on "Witness" in June 2016. "I was tired, I'm human," she shared. "So I took October to June off. I started writing a record in June last year. I wrote over 40 songs. Now I have 15 beautiful songs to represent this story I want to share with the world."

👁 the songs today! Join a WILD countdown to the album on Jun 8, 8p PT on https://t.co/tiEjd4ncWZ. Ready to be a #WITNESS? ❤/ 📹: @Dank_Azaria pic.twitter.com/xyCjzLItzu

— KATY PERRY (@katyperry) 2 Juni 2017

Prior to revealing the track list, Perry announced the tour dates of the U.K. and European leg of her "Witness: The Tour". After she concludes the North American leg in February 2018, the "Roar" hitmaker will head to Europe to kick off the tour in Cologne, Germany on May 23. She will be criss-crossing Europe before embarking on the U.K. dates which will run through June 25.

Perry undoubtedly will have a busy year ahead because she has been confirmed to be one of the judges on "American Idol" revival on ABC. She previously said in a statement, "I am honored and thrilled to be the first judge bringing back the 'American Idol' tradition of making dreams come true for incredible talents with authentic personalities and real stories."

"Witness" track list:

1. "Witness"
2. "Hey Hey Hey"
3. "Roulette"
4. "Swish Swish" featuring Nicki Minaj
5. "Deja Vu"
6. "Power"
7. "Mind Maze"
8. "Miss You More"
9. "Chained to the Rhythm" featuring Skip Marley
10. "Tsunami"
11. "Bon Appetit" featuring Migos
12. "Bigger Than Me"
13. "Save as Draft"
14. "Pendulum"
15. "Into Me You See"