Katy Perry: Will You Be My Witness?
Starring Katy Perry, James Corden, America Ferrera, Anna Kendrick, Sia, RuPaul, Mario López, Caitlyn Jenner, Dita Von Teese, Patty Jenkins
It's a documentary and music movie, and has a rating of 7.8 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Spain.