The 27-year-old singer announced Friday on "The Ellen DeGeneres Show" that she will perform a free show to "thank fans for their incredible support" throughout the year. The "Katy Perry Give Thanks" show at Staples Center will take place at 6 p.m. on Nov. 23, the day after her previously scheduled L.A. concert.
Fans must register on Perry's Facebook page by Monday, Nov. 14, for their chance to receive admission tickets. Recipients will be selected at random and will be sent unique codes to obtain passes to the free show.
Fans are encouraged to recreate their favorite Katy Perry look, as the concert will be filmed and audience members may be featured on camera.
The show will wrap up the pop singer's 122-date California Dreams World Tour.